cannot assign requested address weblogic

• Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers
• Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand
• OverflowAI GenAI features for Teams
• OverflowAPI Train & fine-tune LLMs
• Labs The future of collective knowledge sharing
• About the company Visit the blog

Collectives™ on Stack Overflow

Find centralized, trusted content and collaborate around the technologies you use most.

Q&A for work

Connect and share knowledge within a single location that is structured and easy to search.

Get early access and see previews of new features.

Weblogic Error: Server state changed to FORCE_SHUTTING_DOWN

It was still working when I closed it last week after I installed and conifigured weblogic server but right now it is not starting. Here are last few statements shown in the cmd:

• What have you done to investigate? Is something using that port? Is the IP address correct? I would guess that your PC gets its IP address via DHCP and after rebooting it has a different one to last time, so the fixed address in the WebLogic config is no longer correct. –  Alex Poole Commented May 8, 2017 at 7:12
• So if that is the case? What can be my fix if this situation happens to me in my next boot? Because I have reinstalled Weblogic and it is working fine now. –  Carlo Commented May 8, 2017 at 10:35
• So did your IP address change? You probably want to have a static IP address and not use DHCP for a server. –  Alex Poole Commented May 8, 2017 at 10:38

check whether your server is already is running... and restart the server... after that is does not start the check the port or check the script ... for check the log file whether the particular port is running or not...

• Please make your answer steps-wise and more informative. –  Naeem Ul Wahhab Commented Aug 18, 2017 at 5:07

Your Answer

Reminder: Answers generated by artificial intelligence tools are not allowed on Stack Overflow. Learn more

Sign up or log in

Post as a guest.

Required, but never shown

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy .

Not the answer you're looking for? Browse other questions tagged oracle11g weblogic or ask your own question .

• The Overflow Blog
• Community Products Roadmap Update, July 2024
• Featured on Meta
• We spent a sprint addressing your requests — here’s how it went
• Upcoming initiatives on Stack Overflow and across the Stack Exchange network...
• What makes a homepage useful for logged-in users
• The [lib] tag is being burninated

Hot Network Questions

• Attaching foam to the bottom of a PCB
• Weather on a Flat, Infinite Sea
• firefox returns odd results for file:/// or file:///tmp
• It was the second, but we were told it was the fifth
• Improve spacing around equality = and other math relation symbols
• Is there a way to change a cantrip spell type to Necromancy in order to fulfil the requirement of the Death Domain Reaper ability for Clerics?
• A manifold whose tangent space of a sum of line bundles and higher rank vector bundles
• Case insensitivity for Cyrillic characters in Apache .htaccess RegEx does not work
• Lengths of generators of surface group
• Optimizing Pi Estimation Code
• Plastic plugs used to fasten cover over radiator
• The meaning of "奪耳" in 《說文解字》
• Did Joe Biden refer to himself as a black woman?
• Are there any video/audio recordings of the launch of sputnik 1?
• How to pin to the Task Bar the Device Manager on Windows 11?
• Simulate slow disks in KVM to see effect of LVM cache in test setup
• Does the size of a black hole increase with mass?
• Mac Mini G4 not reinitialized
• How to write a module that provides an 'unpublish comment' shortcut link on each comment
• If I Trace "Pickup", will I pickup?
• Using 50 Ω coax cable instead of passive probe
• Reversing vowels in a string
• Why do Electric Aircraft Seem to Eschew Photovoltaics?
• How to photograph the lettering on a bronze plaque?

11 Oracle WebLogic Server

This chapter describes issues associated with Oracle WebLogic Server. It includes the following topics:

Section 11.1, "General Issues and Workarounds"

Section 11.2, "Administration Console Issues and Workarounds"

Section 11.3, "Apache Beehive Support Issues and Workarounds"

Section 11.4, "Clustering Issues and Workarounds"

Section 11.5, "Configuration Issues and Workarounds"

Section 11.6, "Connector (Resource Adapter) Issues and Workarounds"

Section 11.7, "Console Extensions Issues and Workarounds"

Section 11.8, "Core Server and Core Work Manager Issues and Workarounds"

Section 11.9, "Deployment Issues and Workarounds"

Section 11.10, "EJB Issues and Workarounds Issues and Workarounds"

Section 11.11, "Examples Issues and Workarounds"

Section 11.12, "HTTP Publish/Subscribe Server Issues and Workarounds"

Section 11.13, "Installation Issues and Workarounds"

Section 11.14, "Java EE Issues and Workarounds"

Section 11.15, "JDBC Issues and Workarounds"

Section 11.16, "JMS Issues and Workarounds"

Section 11.17, "JNDI Issues and Workarounds"

Section 11.18, "JSP and Servlet Issues and Workarounds"

Section 11.19, "JTA Issues and Workarounds"

Section 11.20, "Java Virtual Machine (JVM) Issues and Workarounds"

Section 11.21, "Monitoring Issues and Workarounds"

Section 11.22, "Node Manager Issues and Workarounds"

Section 11.23, "Operations, Administration, and Management Issues and Workarounds"

Section 11.24, "Protocols Issues and Workarounds"

Section 11.25, "RMI-IIOP Issues and Workarounds"

Section 11.26, "Security Issues and Workarounds"

Section 11.27, "Spring Framework on WebLogic Server Issues and Workarounds"

Section 11.28, "Upgrade Issues and Workarounds"

Section 11.29, "Web Applications Issues and Workarounds"

Section 11.30, "WebLogic Server Scripting Tool (WLST) Issues and Workarounds"

Section 11.31, "Web Server Plug-Ins Issues and Workarounds"

Section 11.32, "Web Services and XML Issues and Workarounds"

Section 11.33, "WebLogic Tuxedo Connector Issues and Workarounds"

Section 11.34, "Documentation Errata"

Document ID for the 10.3.1 fixed bugs list: 982209.1

Document ID for the 10.3.2 fixed bugs list: 1063554.1

The 10.3.2 list includes fixed bugs for both the WebLogic Server 10.3.1 and 10.3.2 releases.

11.1 General Issues and Workarounds

This section describes the following issues and workarounds:

Section 11.1.1, "Oracle WebLogic Server Version Number"

Section 11.1.2, "Version Number on Oracle WebLogic Server Documentation"

Section 11.1.3, "Oracle ojdbc14.jar File Has Been Changed to ojdbc6.jar"

Section 11.1.4, "Strong Password Enforcement May Cause Issues With WLST Offline Scripts"

Section 11.1.5, "In Turkish Locale, MDS Initialization Fails"

11.1.1 Oracle WebLogic Server Version Number

Oracle Fusion Middleware 11 g contains Oracle WebLogic Server 11 g . The version number of Oracle WebLogic Server is 10.3.2.

11.1.2 Version Number on Oracle WebLogic Server Documentation

Oracle WebLogic Server documents that were updated for Release 11 g Patch Set 1 display the following WebLogic Server version number:

11 g Release 1 (10.3.1)

The WebLogic Server documents that were updated for Patch Set 1 will have a print date of October 2009 on the title page of PDFs and printed documents. The document part number revision on the updated PDF, printed, and HTML versions is -02 (for example, E14529-02) instead of -01.

11.1.3 Oracle ojdbc14.jar File Has Been Changed to ojdbc6.jar

The Oracle ojdbc14.jar file has been changed to ojdbc6.jar , for use with JDK 5 or 6. As a result, any explicit references you make to ojdbc14.jar must be changed to ojdbc6.jar .

11.1.4 Strong Password Enforcement May Cause Issues With WLST Offline Scripts

With the implementation of strong password enforcement (8 character minimum with one numeric or special character) in this release of WebLogic Server, existing scripts could potentially encounter issues.

Use either of the following workarounds to bypass the new password restrictions.

Set the BACKWARD_COMPAT_PW_CHECK environment variable to true .

Include the -Dbackward.compat.pw.check=true option when invoking WLST.

Oracle recommends that you change passwords to comply with the new password requirements, as this variable and option will be removed in a future release of WebLogic Server.

11.1.5 In Turkish Locale, MDS Initialization Fails

Any applications that use an MDS repository cannot be deployed or run with the JAXB version bundled with WebLogic Server as null values are returned for attributes named id .

Start the server in English locale.

11.2 Administration Console Issues and Workarounds

Section 11.2.1, "Cached JDBC Information is not Displayed"

Section 11.2.2, "Pressing Browser Back Button Discards Context"

Section 11.2.3, "Unsupported Work Manager Configurations Can Be Created"

Section 11.2.4, "Server Status Table Reflects Inconsistent Information"

Section 11.2.5, "Exceptions When Defining a Security Policy for an EJB"

Section 11.2.6, "Administration Console Does Not Always Reflect External Changes Made in a Deployment Plan"

Section 11.2.7, "Screen Reader Configuration Must Be Changed in Order to Read Link Title Attributes"

Section 11.2.8, "Oracle OCI Driver Support"

Section 11.2.9, "Resource Changes May Not Be Reflected in Console Restart List"

11.2.1 Cached JDBC Information is not Displayed

Information about cached JDBC statements is not displayed on the JDBC Monitoring pages.

11.2.2 Pressing Browser Back Button Discards Context

After a page flow completes in the Administration Console, it forwards to a different page, typically a table.

Pressing the browser Back button at this point results in an attempt to load the last JSP file in the completed assistant. At this point, all of the context for this assistant is discarded.

Oracle recommends that you do not use the browser Back button to step back into an assistant once changes are cancelled or finished, and that you do not go back to a previous step in an assistant. Instead, use the navigation links and buttons in the Administration Console.

11.2.3 Unsupported Work Manager Configurations Can Be Created

The Administration Console permits the creation of Work Manager configurations that are not supported and do not function as intended. Incorrect Work Manager configurations may result in a number of exceptions being recorded in the server logs, most commonly 'Validation problems were found' exceptions while parsing deployment descriptors.

Follow the guidelines described in the online help for Work Manager configurations. Specifically, you can only assign one request class to any given Work Manager, and that request class must be of the same or a broader scope than the Work Manager. You should not assign an application-scoped request class to a global Work Manager, and you should not create more than one application-scoped request class for an application-scoped Work Manager.

Correcting the Work Manager configurations to match the documented constraints resolves these issues.

11.2.4 Server Status Table Reflects Inconsistent Information

The Server Status table on the Cluster: Monitoring: Summary page includes two default columns: Primary and Secondary Distribution Names . These fields do not always reflect all of the replication statistics that are collected and displayed on the Cluster: Monitoring: Failover page, depending on the replication scenario.

Please refer to the Cluster: Monitoring: Failover page for definitive information.

11.2.5 Exceptions When Defining a Security Policy for an EJB

When defining security policies in the Administration Console for an EJB deployment that references types defined in a separate library deployment, exceptions can be observed if that library deployment is not available to the Console.

All library deployments should be targeted at the WebLogic Server Administration Server as well as any Managed Servers needed to support referencing applications. This will ensure that when defining policies, the Console will have access to those library deployments so that referenced types can be class-loaded as needed.

11.2.6 Administration Console Does Not Always Reflect External Changes Made in a Deployment Plan

The Administration Console does not always reflect external changes made in a deployment plan. If a change is made in a deployment plan outside of the Console (for example, using Workshop, editing the plan text files directly, or updating a deployment with a new plan using WLST or webLogic.Deployer) while a Console user is also viewing that deployment plan, the Console user will not see those changes.

Navigate to a configuration page for a different deployment, then navigate back to the original deployment again.

11.2.7 Screen Reader Configuration Must Be Changed in Order to Read Link Title Attributes

To improve its level of accessibility to blind users, in certain situations, the Administration Console provides title attributes for links whose purpose or target needs a better explanation than the link text alone provides. The primary case is when links are part of a 'simulated tab' group, and of which 'tab' is currently selected. However, screen reader users need to make a configuration change for these link title attributes to be read instead of the visible link text.

The following instructions are provided for the leading screen reader, JAWS (by Freedom Scientific):

To configure JAWS to read link titles:

With WebLogic Server as the active browser window, activate JAWS' Personalized Settings dialog by pressing Insert+Shift+V .

For JAWS versions 6.x, 7.x, and 8.x:

Navigate to the Links With Text Only setting, then select the Title option (toggle through the values by pressing the spacebar).

For JAWS version 9.x:

Expand the Links Options node, navigate to the Text Links option, then select the Show Using Title option (toggle through the values by pressing the spacebar).

Select Close to save the configuration change.

11.2.8 Oracle OCI Driver Support

The Oracle OCI driver is no longer explicitly listed as a preconfigured driver type in the Administration Console.

The Oracle OCI driver remains a supported driver for application data connectivity, consistent with prior releases of Oracle WebLogic Server. However, users must now specify all required configuration properties manually, including the data base username.

11.2.9 Resource Changes May Not Be Reflected in Console Restart List

The WebLogic Server Administration Console's Change Center includes a link to display a list of servers that need to be restarted to reflect current configuration changes. Some configuration changes, such as those to a WLDF system resource, are not reflected in this list and may result in the Activate button on the Change center being enabled even after activating changes.

You may need to restart the affected Managed Servers before you can make further configuration changes. You can view the current pending changes using the following WLST commands:

java weblogic.WLST

startEdit()

showChanges()

11.3 Apache Beehive Support Issues and Workarounds

There are no known Apache Beehive Support issues in this release of WebLogic Server.

11.4 Clustering Issues and Workarounds

There are no known Clustering issues in this release of WebLogic Server.

11.5 Configuration Issues and Workarounds

Section 11.5.1, "Use the -Dfile.encoding Property When Running WLST in Windows in a Non-English Locale"

Section 11.5.2, "WebLogic Configuration Tools Can Fail If WebLogic Installation Path Contains Spaces"

11.5.1 Use the -Dfile.encoding Property When Running WLST in Windows in a Non-English Locale

WLST can be run with localized messages by setting the desired locale. You should be aware of the following issue when running WLST in a non-English locale.

On Windows operating systems, if a DOS command window's active code page is different from the system's local (ANSI) code page, you must add the -Dfile.encoding=< DOS window's active code page > property to the WLST process when starting WLST via a DOS command window. This changes the default character set for the Java process. For example:

The active code page for a DOS window is 850. This can be achieved by issuing the chcp command in the WLST command window.

The system's local (ANSI) code page is 1250. You can determine the system's local code page by viewing the value of the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\NLS\CodePage\ACP key in the Windows registry. Files that are created by standard Windows editing tools (such as Notepad or Wordpad) are encoded in this way.

In this situation, you can start WLST as follows:

set WLST_PROPERTIES="-Dfile.encoding=cp850"

$WL_HOME%\wlserver_10.3\common\bin\wlst.cmd

11.5.2 WebLogic Configuration Tools Can Fail If WebLogic Installation Path Contains Spaces

On some Microsoft Windows platforms, the WebLogic configuration tool commands (including wlst , config , pack , and unpack ) can fail if the WebLogic installation path contains a space. In this case, the command may fail with a java.lang.ClassNotFoundException , where the class is derived from the portion of the installation path after the space. The commands fail when short file name generation has been disabled in the Windows registry.

You must enable short name generation in the Windows registry in order for spaces to be properly handled by the configuration tools. To enable short name generation:

Run regedit .

Navigate to the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem folder.

Double-click NtfsDisable8dot3NameCreation and set its value to 0 .

Reboot for the change to take effect.

11.6 Connector (Resource Adapter) Issues and Workarounds

There are no known Connector (Resource Adapter) issues in this release of WebLogic Server.

11.7 Console Extensions Issues and Workarounds

There are no known Extensions issues in this release of WebLogic Server.

11.8 Core Server and Core Work Manager Issues and Workarounds

Section 11.8.1, "Threads Become Stuck While Waiting to Get a Connection"

Section 11.8.2, "Using IPv6-Formatted Addresses"

Section 11.8.3, "Server Cannot Be Started After a Whole Server Migration"

Section 11.8.4, "Object State is not Retained After Renaming Field"

Section 11.8.5, "Servers Configured to Listen on a Hostname Are Listening on a Different Hostname After Startup"

Section 11.8.6, "Edits to startWebLogic.cmd Are Required for Proper Server Migration"

11.8.1 Threads Become Stuck While Waiting to Get a Connection

When a machine that is hosting one of the Managed Servers is abruptly shut down, a network cable is pulled, or its network interface card has issues, and any server attempts communication with that managed server, threads become stuck waiting to get a connection.

This can currently be resolved by using a private flag:

-Dweblogic.client.SocketConnectTimeoutInSecs

and setting an appropriate timeout value that will release the thread attempting to make the connection and allow the request to fail quickly.

11.8.2 Using IPv6-Formatted Addresses

When using an IPv6-formatted address for WebLogic Server, the URL should include square brackets ('[' and ']') for the host address. Otherwise, WLST may fail to connect to the running server.

Add square brackets to the host address. For example:

t3://[fe80:0:0:0:203:baff:fe2f:59e5]:9991

11.8.3 Server Cannot Be Started After a Whole Server Migration

If the WebLogic Server Administration Server is down when a Whole Server Migration occurs for a clustered server, and the server migrates to a machine on which it was never run before, the server cannot be started on the new machine.

Use one of the following workarounds for this issue:

Ensure that the Administration Server is up when the server migration is being performed.

Use a shared disk/NFS for all the migratable servers in the cluster.

11.8.4 Object State is not Retained After Renaming Field

When FastSwap is enabled in a J2EE application, you can make certain types of changes to Java classes during development and expect to see the change without re-deploying, with all instance states of the Java object being retained.

One type of change that does NOT retain the object state is that when a field name is changed, it is treated as follows:

the field with old name is deleted

the field with new name is added

Thus, in this case, any state in the old field is not carried over to the renamed field.

Using the Workshop or FastSwap ant task, you may see a FastSwap operation completed successfully message, even when an instance field name change causes a value reset.

You should expect an instance value to be reset when you change a field name.

11.8.5 Servers Configured to Listen on a Hostname Are Listening on a Different Hostname After Startup

When using a hostname to specify configuring the listen address on the WebLogic Server Administration Server or a Managed Server, machines that are configured with multiple Ethernet cards may listen on a different hostname after startup. For example:

The machine has 3 Ethernet cards

Card 1 is mapped to hostname1-s (DNS registered hostname)

Card 2 is mapped to hostname1-i (DNS registered hostname)

Card 3 is mapped to hostname1 (actual node's hostname)

You configure the server to listen on hostname1

After starting the server, it is listening on hostname1-s because Windows resolves the actual node's hostname to the first enabled Ethernet card address

Use one of the following three workarounds for this issue:

Use the IP address, instead of the hostname, as the listen address of the WebLogic Server Administration Server. On Managed Servers, use the IP address as the listen address, or configure the actual physical hostname to the first Ethernet card in the machine.

Add the following entry to the C:\Windows\system32\drivers\etc\hosts file on the machine:

<ip_address> <hostname>

Change the order of the network cards in the machine so that the card with the actual node's hostname is Card 1.

11.8.6 Edits to startWebLogic.cmd Are Required for Proper Server Migration

Included per bug 8419752, RN bug 9304290, found in 10.3.2, Windows

When performing server migrations on Windows, if you do not comment out some lines in startWebLogic.cmd , the following error message is displayed when restarting a migrated server:

For correct behavior of server migration in a Windows environment, edit the startWebLogic.cmd file for the domain, and comment out the following lines:

Leave these lines commented to permantly resolve the issue.

11.9 Deployment Issues and Workarounds

Section 11.9.1, "security-permission Element is not Available in weblogic-application.xml"

Section 11.9.2, "Extraneous String Values Interpreted as File Specification"

Section 11.9.3, "java.lang.NoClassDefFoundError is Displayed"

Section 11.9.4, "The restore Method Does Not Update the DConfig Bean With Plan Overrides"

Section 11.9.5, "config-root < directory > not found Warning Is Displayed When Applying a Deployment Plan"

11.9.1 security-permission Element is not Available in weblogic-application.xml

The security-permission element is available in the weblogic.xml and weblogic-ejb-jar.xml deployment descriptors, but is not available in the weblogic-application.xml descriptor. Therefore, in an Enterprise application, you can only apply security policies to JAR files that are EJBs or Web applications.

11.9.2 Extraneous String Values Interpreted as File Specification

The weblogic.Deployer tool interprets any extraneous string values between command-line arguments as a file specification. For example, if you enter the command:

java weblogic.Deployer -activate -nostage true -name myname -source c:\myapp\mymodule

the tool attempts to activate a file specification named true, because the -nostage option takes no arguments and true is an extraneous string value.

11.9.3 java.lang.NoClassDefFoundError is Displayed

While using the WebLogic Server Administration Console with applications or EJBs deployed on a Managed Server that depend on a deployed library, you may encounter a java.lang.NoClassDefFoundError .

The WebLogic Server Administration Console needs access to any shared library deployments so that Java data types and annotations can be processed. Therefore, all shared library deployments should always be targeted to the WebLogic Server Administration Server in addition to any Managed Servers or clusters.

11.9.4 The restore Method Does Not Update the DConfig Bean With Plan Overrides

The restore method does not correctly update the DConfig Bean with the plan overrides. For example, given the following steps:

the plan does not correctly override the DConfig Bean.

Specify the plan when initializing the configuration for the application. For example:

11.9.5 config-root < directory > not found Warning Is Displayed When Applying a Deployment Plan

If you use the Administration Console to make configuration changes to an application, a deployment plan will be generated. If external descriptors are generated as part of the deployment plan, they are placed in the config root plan directory. This directory will be set in the deployment plan 'config-root' attribute.

If no external descriptors are required, the config root directory will not be created, and a warning is displayed when you apply the deployment plan. This results in the following warning in the server output:

Create the plan directory manually.

11.10 EJB Issues and Workarounds Issues and Workarounds

Section 11.10.1, "Primary Key in Oracle Table is CHAR"

Section 11.10.2, "No Available Annotation That Enables Creation of a Clusterable Timer"

Section 11.10.3, "Kodo's MappingTool Cannot Generate Schemas"

Section 11.10.4, "Extensions to the JPA Metadata Model Can Only Be Specified Via Annotations"

Section 11.10.5, "Lookup Method Injection Not Supported by Spring"

Section 11.10.6, "Deserializing a JDO PersistenceManagerFactory in a Managed Environment May Fail"

Section 11.10.7, "Indexes Not Always Created During Schema Creation"

Section 11.10.8, "OpenJPA throws an exception when @Id fields are also annotated as @Unique"

Section 11.10.9, "Cache Hit and Miss Counts May Rise Unexpectedly"

Section 11.10.10, "Open JPA Tries to Create a Table Even if the Table Exists"

Section 11.10.11, "EJB Applications Fail During Serialization"

Section 11.10.12, "Message-Driven EJB (MDB) Container Can Fail to Provide Reproducible Behavior"

11.10.1 Primary Key in Oracle Table is CHAR

The primary key in an Oracle table is a CHAR but the query field in the SQL table is a VARCHAR2.

Change the database schema from CHAR to VARCHAR2. Using CHAR as a primary key is not recommended for the Oracle database.

11.10.2 No Available Annotation That Enables Creation of a Clusterable Timer

There is no annotation for EJB3 beans or Ejbgen that enables creation of a clusterable timer.

Create a weblogic-ejb-jar.xml file and put the <timer-implementation> element and corresponding values into the file.

11.10.3 Kodo's MappingTool Cannot Generate Schemas

Kodo's MappingTool cannot generate schemas for classes that use BLOBs in their primary key. BLOBs can be used in a primary key, but the schema must be defined manually. Note that support for BLOB columns in primary keys is not mandated by either the JDO or JPA specifications.

11.10.4 Extensions to the JPA Metadata Model Can Only Be Specified Via Annotations

Extensions to the JPA metadata model can only be specified via annotations, and not via a structure similar to the orm.xml file defined by the specification.

To specify Kodo-specific metadata for your object model, either:

use the Kodo-specific annotations, or

convert your XML-based metadata to the JDO metadata format, which does support XML specification of extensions.

11.10.5 Lookup Method Injection Not Supported by Spring

The Weblogic Spring injection extension model doesn't support lookup method injection.

11.10.6 Deserializing a JDO PersistenceManagerFactory in a Managed Environment May Fail

Deserializing a JDO PersistenceManagerFactory in a managed environment may fail. The exception states that the javax.jdo.PersistenceManagerFactoryClass property is missing. Note that serializing a PersistenceManagerFactory should not generally be necessary in a managed environment.

11.10.7 Indexes Not Always Created During Schema Creation

Indexes declared at the class level are not always created during schema creation.

Create the indexes manually after running the schema generation tools.

11.10.8 OpenJPA throws an exception when @Id fields are also annotated as @Unique

OpenJPA throws an exception when @Id fields are also annotated as @Unique in some databases. Database primary keys are unique by definition. Some databases implement this by creating a unique index on the column.

Do not specify both @Id and @Unique on a single field.

11.10.9 Cache Hit and Miss Counts May Rise Unexpectedly

The cache hit and miss counts may rise unexpectedly when manipulating entities without version data. The extra cache access occurs when the EntityManager closes and all contained entities are detached. Entities without version fields appear to the system to be missing their version data, and the system responds by checking their version in the cache before detachment.

Entities with version fields or other version strategies do not cause extra cache access.

11.10.10 Open JPA Tries to Create a Table Even if the Table Exists

When using the MySQL database, and OpenJPA is configured to automatically run the mapping tool at runtime and create tables within the default schema (for example):

OpenJPA will try to create the table even if the table already exists in the database. A PersistenceException will be thrown to indicate that the table already exists and the table creation statement fails.

To avoid this problem, if you are using the MySQL database, don't configure OpenJPA to automatically run the mapping tool at runtime and specify the default schema at the same time.

11.10.11 EJB Applications Fail During Serialization

EJB applications that use IIOP and send JPA entities from the server to the client will fail during deserialization if the entities are Serializable (but not Externalizable) and do not declare a writeObject() method.

Add a writeObject() method to such entity classes. The write object can be trivial:

11.10.12 Message-Driven EJB (MDB) Container Can Fail to Provide Reproducible Behavior

When using multi-threaded processing for non-transactional topic MDBs, the MDB container can fail to provide reproducible behavior. For example, if a runtimeException is thrown in the onmessage() method, the container may still acknowledge the message.

Set the max-beans-in-free-pool attribute to 1 in the deployment descriptor.

11.11 Examples Issues and Workarounds

Section 11.11.1, "Security Configuration in medrec.wls.config"

Section 11.11.2, "HTML File not Created for StreamParser.java File"

Section 11.11.3, "Warning Message Appears When Starting Medrec or Samples Domain"

Section 11.11.4, "Deployment Exception for MedRec Samples Server After Rollback from WebLogic Server 10.3.2"

11.11.1 Security Configuration in medrec.wls.config

The medrec.wls.config target in SAMPLES_HOME /server/medrec/setup/build.xml has a known issue with respect to security configuration.

11.11.2 HTML File not Created for StreamParser.java File

The ../xml/stax example contains two files with the same root but different extensions: StreamParser.java and StreamParser.jsp . The samples viewer build, however, creates just one corresponding HTML file, rather than two for each type of file. In this case only the StreamParser.jsp file has an equivalent HTML file; the StreamParser.java file does not.

The problem occurs because of a setting in the build.xml file that controls the behavior of java2html to generate the files for the documentation.

When using java2html , the useShortFileName="true" parameter crops off the file extensions for the source files to create the file names for the HTML output files. If two files have the same name and different file extensions, whichever HTML file is generated last will overwrite previous ones.

Set the useShortFileName parameter to "false". This setting generates HTML files with the file extensions included in the name. The drawback to this solution is that every link that points to the HTML output file needs to be revised, regardless of whether the files in question were affected by the bug.

11.11.3 Warning Message Appears When Starting Medrec or Samples Domain

When you start the medrec or samples domains, you may see a warning message similar to this:

This warning message appears in the standard output of the Console while starting a WebLogic Server sample application with an asynchronous Web Service deployed.

The warning is harmless and can be ignored.

11.11.4 Deployment Exception for MedRec Samples Server After Rollback from WebLogic Server 10.3.2

If you upgrade from WebLogic Server 10.3.1 to WebLogic Server 10.3.2, then roll back to the 10.3.1 installation, the MedRec samples server starts, but a Deployment exception occurs and the Administration Console cannot be accessed.

11.12 HTTP Publish/Subscribe Server Issues and Workarounds

Section 11.12.1, "Authentication and Authorization of the Local Client is not Supported"

Section 11.12.2, "Event Messages Published by Local Clients Cannot Be Received by Subscribed Clients Connected to Other Servers"

Section 11.12.3, "Event Messages Published By Local Clients Do Not Go Through Message Filters"

11.12.1 Authentication and Authorization of the Local Client is not Supported

The HTTP Publish/Subscribe server does not support authentication and authorization of the local client. The local client has full permissions to operate on channels of the HTTP Publish/Subscribe server, which means the local client can create/delete channels and publish/subscribe events from channels.

11.12.2 Event Messages Published by Local Clients Cannot Be Received by Subscribed Clients Connected to Other Servers

In a clustering environment, event messages published by a local client on a server can be received only by subscribed clients connected to the same server. These messages cannot be received by subscribed clients connected to other servers in the cluster.

11.12.3 Event Messages Published By Local Clients Do Not Go Through Message Filters

Event messages published to a channel by a local client will not go through the Message Filters configured to that channel.

11.13 Installation Issues and Workarounds

Section 11.13.1, "Issue with Oracle WebLogic Server Upgrade Installation"

Section 11.13.2, "Configuration Wizard Password Does Not Allow Special Characters"

Section 11.13.3, "WebLogic Server Home Directory Cannot Be the Same as the Middleware Home Directory"

Section 11.13.4, "Installation Command Requires Memory Options"

11.13.1 Issue with Oracle WebLogic Server Upgrade Installation

The Oracle WebLogic Server 11 g Release 1 installer does not download the Sybase JDBC drivers. When you try to upgrade an existing WebLogic Server 10.3 installation using the latest installer, it does not remove the Sybase JAR files from the original installation. The installer upgrades only the weblogic.jar file.

The Sybase JAR files (jconn2.jar, jconn3.jar, and jConnect.jar) in the /server/lib or /server/ext/jdbc/sybase directories are removed from the manifest classpath in the upgraded weblogic.jar file. Therefore, if the classpath of a WebLogic Server application does not include Sybase JAR files and only includes weblogic.jar then after the upgrade installation, the application will throw a ClassNotFoundException.

To work around this issue, explicitly add Sybase JAR files in the WebLogic Server application classpath.

11.13.2 Configuration Wizard Password Does Not Allow Special Characters

Depending on your country locale, special characters may not be recognized when trying to input and confirm the password when using the Configuration Wizard.

Copy the problematic characters into the clipboard and paste them into the password fields. For security reasons, do not copy the entire password into the clipboard.

11.13.3 WebLogic Server Home Directory Cannot Be the Same as the Middleware Home Directory

You cannot use the Middleware home directory as the WebLogic Server home directory. For example, if the Middleware home directory is C:\Oracle\Middleware, you cannot specify C:\Oracle\Middleware as the home directory for WebLogic Server. Doing so has the potential to cause serious issues with the Configuration Wizard, Template Builder, and possibly other WebLogic Server tools.

Install WebLogic Server in a directory other than the Middleware home directory. For example, if the Middleware home directory is C:\Oracle\Middleware, it is permissible to install WebLogic Server in C:\Oracle\Middleware\wlserver or C:\Oracle\wlserver.

11.13.4 Installation Command Requires Memory Options

When using Sun JDK 64-bit, install Oracle WebLogic Server using the following command:

11.14 Java EE Issues and Workarounds

Section 11.14.1, "FastSwap May Relax the Access Modifiers of Fields and Methods"

Section 11.14.2, "FastSwap Does Not Support Redefinition of the Entity Bean and ejbClass (Session/MDB)"

Section 11.14.3, "Classpath Order Is Not Guaranteed When There Are Multiple JARs in the Same EAR File"

11.14.1 FastSwap May Relax the Access Modifiers of Fields and Methods

FastSwap may relax the access modifiers of fields and methods. Private and protected members may be made public at runtime. This changes the behavior of reflection and may affect reflection-based frameworks such as Struts.

11.14.2 FastSwap Does Not Support Redefinition of the Entity Bean and ejbClass (Session/MDB)

FastSwap does not support redefinition of the Entity bean and ejbClass (Session/MDB). Therefore, any updates to entity classes will cause redefinition errors.

After updating an entity class, redeploy the application.

11.14.3 Classpath Order Is Not Guaranteed When There Are Multiple JARs in the Same EAR File

When you have an EAR file containing separate JAR files, and two or more of those JAR files have a class with the same name, it is not possible to predict from which of those JAR files WebLogic Server will instantiate the class. This is not an issue if the classes are the same, but if they are different implementations, the results are unpredictable.

Currently there is no known workaround for this issue.

11.15 JDBC Issues and Workarounds

Section 11.15.1, "Queries Can Take Longer When Using Data Direct 4.0 MSSQL Driver"

Section 11.15.2, "An Attempt to Access an LLR Data Source Fails From Multiple Server Instances"

11.15.1 Queries Can Take Longer When Using Data Direct 4.0 MSSQL Driver

In WebLogic Server Release 11 g R1 Patch Set 1, our OEM DataDirect drivers were upgraded to 4.0. In order for the SQLServer driver to fully handle new DBMS datatypes, when running in it's default configuration, queries will take longer. If application access to new datatypes can be limited to getString() , the following configuration workarounds will restore the performance.

Add the following driver property to the list of driver properties for the WebLogic data source's connection pool. From the Administration Console, select the Configuration>Connection Pool tab for the data source.

For a non-XA connection pool, add:

ReportDateTimeTypes=false

For an XA connection pool, add:

ExtendedOptions=ReportDateTimeTypes=false

Alternatively, you can accomplish the same result by adding the property to the data source's XML configuration file.

For non-XA:

11.15.2 An Attempt to Access an LLR Data Source Fails From Multiple Server Instances

A new system property, -Dweblogic.jdbc.remoteEnabled , has been added to JDBC in Oracle WebLogic Server 11 g Release 1 Patch Set 1 (10.3.2). For compatibility with prior releases of WebLogic Server, the default setting of this property is true . When this property is set to false , remote JDBC access is turned off, and such access via a remote client will result in an exception.

System Limitation

When the -Dweblogic.jdbc.remoteEnabled property is set to false , any attempt to access an LLR data source will fail from multiple server instances.

This limitation also applies to the 1PC and emulate XA transaction options for non-XA data sources.

Since there is no performance benefit when using LLR in a multiple server configuration, change the application to use XA instead.

11.16 JMS Issues and Workarounds

Section 11.16.1, "Deployment Descriptor Validation Fails"

Section 11.16.2, "Exception When Multiple JMS Producers Use the Same JMS Client SAF Instance"

Section 11.16.3, "Multi-byte Characters are not Supported in WebLogic Server Store File and Directory Names"

Section 11.16.4, "C Programs That Use the JMS C Client Library May Experience a JVM Failure"

11.16.1 Deployment Descriptor Validation Fails

Deployment descriptor validation fails when descriptor validation is enabled, and an EAR file contains only JMS modules.

Make sure that there is at least one J2EE specification-compliant module in the EAR.

11.16.2 Exception When Multiple JMS Producers Use the Same JMS Client SAF Instance

When multiple JMS producers use the same JMS Client SAF instance (within a single JVM), depending on the timing of the JMS SAF client creation, you might receive the following exception:

When using multiple JMS SAF client producers, try introducing a small delay between the creation of each new client.

11.16.3 Multi-byte Characters are not Supported in WebLogic Server Store File and Directory Names

There is no support for multi-byte characters in WebLogic Store file and directory names. For instance, when the WebLogic Server name has multi-byte characters, the default store cannot be created, and WebLogic Server will not boot.

Create WebLogic Server instances without multi-byte characters in the path name and use that path name rather than the default store. Do not use multi-byte characters in the Weblogic Server name.

11.16.4 C Programs That Use the JMS C Client Library May Experience a JVM Failure

A C program that uses the JMS C client library may crash with a JVM failure. This could be related to a known intermittent race-condition that is only known to occur with certain JVM products, where the likelihood of failure can change based on the JVM version and patch level, operating system, and hardware. Specifically, the JMS C-Client library implicitly attaches C-threads to the JVM, but fails to detach them when it is done with them.

The workarounds are:

Add code in the client to detach the JVM from any C thread that exits and that has previously called into the JMS C-API.

Do not allow any C thread that has previously called into the JMS C-API to exit before the entire process exits.

Sun 1.5 and later can specifically handle this problem, although it is still recommended to call detach even with the Sun JVM. For more information, see:

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6219874

Upgrade to a newer JVM. Version 1.5 and later of the Sun JVM, and version R27.6 of the JRockit JVM do not have this problem, although it is still recommended to call detach even with the updated JVMs. For more information about this issue with the Sun JVM, see

11.17 JNDI Issues and Workarounds

This section describes the following issue and workaround:

Section 11.17.1, "JMS Message Consumers Will Not Always Reconnect After a Service Migration"

11.17.1 JMS Message Consumers Will Not Always Reconnect After a Service Migration

JMS message consumers will not always reconnect after a service migration when an application's WLConnection.getReconnectPolicy() attribute is set to all . If the consumers do not get migrated, either an exception is thrown or onException will occur to inform the application that the consumer is no longer valid.

The application can refresh the consumer either in the exception handler or through onException .

11.18 JSP and Servlet Issues and Workarounds

Section 11.18.1, "Deployment Plans Cannot Be Used To Override Two Descriptors"

Section 11.18.2, "Spring Dependency Injection Not Supported on JSP Tag Handlers"

Section 11.18.3, "503 Error When Accessing an Application With a Valid sessionid"

11.18.1 Deployment Plans Cannot Be Used To Override Two Descriptors

Deployment plans cannot be used to override the following two descriptors during deployment of a Web application or a Web module: WEB-INF/classes/META-INF/persistence.xml and WEB-INF/classes/META-INF/persistence-configuration.xml. Deployment plans can otherwise be used to override any descriptor.

Package WEB-INF/classes/META-INF/persistence.xml and WEB-INF/classes/META-INF/persistence-configuration.xml (if present) along with related class files into a JAR file. The JAR file must then be placed in the WEB-INF/lib directory of the Web application or Web module. A deployment plan can be used to override the two descriptors in such a JAR file.

11.18.2 Spring Dependency Injection Not Supported on JSP Tag Handlers

With the Spring extension model enabled, WebLogic Server 10.3 or later does not support Spring Dependency Injection (DI) on JSP tag handlers for performance reasons.

Currently, WebLogic Server supports Spring DI on most Web components, for example, servlets, filters and listeners. Spring DI is not, however, presently supported on JSP tag handlers for performance reasons.

11.18.3 503 Error When Accessing an Application With a Valid sessionid

When a session is persistent and an older version of a servlet context is retired, accessing the application with a valid sessionid will cause a 503 error.

For example, the session-persistent type of a versioned Web application is 'file'. A user can access the application successfully. Later, version 2 of the application is redeployed and version 1 is retired. If the same user accesses the application, they will get a 503 error.

11.19 JTA Issues and Workarounds

There are no known JTA issues in this release of WebLogic Server.

11.20 Java Virtual Machine (JVM) Issues and Workarounds

Section 11.20.1, "1.4 Thin Client Applet Cannot Contact WebLogic Server"

Section 11.20.2, "Applications running on RH Linux and Intel G5 Processors May Experience Intermittent Time Issues"

11.20.1 1.4 Thin Client Applet Cannot Contact WebLogic Server

Due to a known Sun Microsystems VM bug (513552), a 1.4 Thin Client Applet cannot contact WebLogic Server 9.0 or later. This is because the VM does not distinguish correctly between a client and a server connection. The VM creates a server-type connection and caches it. It then attempts to make a client-type connection, finds the cached connection and tries to use that, but then encounters an error because clients are not allowed to use server connections.

None. This issue must be resolved by Sun Microsystems.

11.20.2 Applications running on RH Linux and Intel G5 Processors May Experience Intermittent Time Issues

Applications that run on RH Linux on Intel G5 processors and that also directly or indirectly use system time calls may experience intermittent time issues if the ClockSource is set to tsc (the default). The standard POSIX C gettimeofday() call, and consequently also the Java System.currentTimeMillis() and java.util.Date() calls can intermittently return a value that is approximately 4400 seconds in the future, even in a single-threaded application.

This issue is not unique to WebLogic or Java, but applies to any application running on RH Linux on Intel G5 processors. Issues can occur for applications that either explicitly make a time call using standard Java, or explicitly by using any time-based application server services.

Possible symptoms include, but are not limited to, premature transaction timeouts, unexpected expiration of JMS messages, and incorrectly scheduled timers.

If you're interested in a standalone reproducer for this problem, contact Oracle and reference bug number 8160147.

There is no known official patch for Linux. Instead, change the clock source from tsc to hpet . After making this modification on test systems, exceptions due to invalid System.currentTimeMillis()/gettimeofday() return values were no longer seen. To change the system clock from tsc to hpet on a trial basis, perform the following steps as root :

disable ntpd (if running)

echo 'hpet' &gt; /sys/devices/system/clocksource/clocksource0/current_clocksource

enable ntpd

Note that this change will not survive a reboot. For more information, please see: http://www.gossamer-threads.com/lists/linux/kernel/813344

11.21 Monitoring Issues and Workarounds

Section 11.21.1, "MBean Attributes not Explicitly Marked as @unharvestable Appear as Harvestable in the WebLogic Server Administration Console"

Section 11.21.2, "WatchData Field in an Outgoing Notification is Empty"

Section 11.21.3, "NullPointerException Occurs When Configuring the First WLDF Watch"

Section 11.21.4, "Complex and Array Type Attributes Have Been Removed From the SNMP MIB"

Section 11.21.5, "The BEA Prefix in Message IDs Will Be Changed in a Future Release"

11.21.1 MBean Attributes not Explicitly Marked as @unharvestable Appear as Harvestable in the WebLogic Server Administration Console

The @unharvestable tag is not being honored at the interface level. If MBean attributes are not explicitly marked as @unharvestable , they are considered to be harvestable and will appear as harvestable in the WebLogic Administration Console.

You can explicitly mark MBean attributes as @unharvestable .

11.21.2 WatchData Field in an Outgoing Notification is Empty

When a Harvester watch rule variable resolves to multiple metric data points triggers, the WatchData field in the outgoing notification would be empty; normally this is supposed to contain a list of the MBean instances and the actual values of the attributes used to evaluate the rule.

11.21.3 NullPointerException Occurs When Configuring the First WLDF Watch

When configuring the WLDF Harvester for the first time after a server reboot, if you attempt to configure the first WLDF Watch in a WLDF module on an MBean Metric in the DomainRuntime namespace, a NullPointerException occurs. The error occurs because the console is attempting to query the Harvester for the set of MBeans that are available on the server's DomainRuntime MBeanServer before the Harvester has finished initializing. This occurs only if both (a) the Harvester is not yet initialized and (b) the first Watch created in a WLDF module is being configured for an MBean in the DomainRuntime namespace.

This is not a serious error.

Cancel the Watch creation attempt and retry. The NullPointerException error should not occur again.

11.21.4 Complex and Array Type Attributes Have Been Removed From the SNMP MIB

Entries for MBean attributes that are either complex types or arrays of complex types have been removed from the SNMP MIB in WebLogic Server 10.3.1, as SNMP does not support these types natively. Previous versions of WebLogic Server returned Object.toString() for complex type objects, which is not meaningful for any monitoring purpose.

11.21.5 The BEA Prefix in Message IDs Will Be Changed in a Future Release

In an upcoming release of WebLogic Server, the current default prefix for catalog and non-catalog Message IDs will be changed from the current BEA prefix to WL.

You should be prepared for this future change. In the interim, here are some guidelines to consider:

Avoid depending on BEA for Message ID prefixes in scripts, filter expressions, etc.

For log messages such as the following:

it is better for you to filter on '000365' and not on the BEA prefix itself.

Your log parsing scripts should be updated to look for both BEA and WL, instead of filtering only on BEA.

11.22 Node Manager Issues and Workarounds

There are no known Node Manager issues in this release of WebLogic Server.

11.23 Operations, Administration, and Management Issues and Workarounds

There are no known Operations, Administration, and Management issues in this release of WebLogic Server.

11.24 Protocols Issues and Workarounds

There are no known Protocols issues in this release of WebLogic Server.

11.25 RMI-IIOP Issues and Workarounds

Section 11.25.1, "Ant 1.7 rmic Task Incompatibility"

11.25.1 Ant 1.7 rmic Task Incompatibility

Calls to the Ant version 1.7 rmic task automatically add a -vcompat flag , which is not compatible with rmic for Oracle WebLogic Server.

Use either of the following workarounds if your rmic call is of the form:

Add a stubversion

Remove the compiler flag

11.26 Security Issues and Workarounds

Section 11.26.1, "StoreBootIdentity Option Works Only if the Appropriate Server Security Directory Exists"

Section 11.26.2, "Connections Requiring a NULL Cipher Will Fail Unless AllowUnencryptedNull Cipher is Set to True"

Section 11.26.3, "WebLogic Server Instance Experiences Boot Time Failure with SecurityServiceException"

Section 11.26.4, "Authentication Failure After Upgrading a Domain From WLS 6.1"

Section 11.26.5, "InvalidParameterException Message Generated and Displayed in the Administration Console"

Section 11.26.6, "Default Web Permissions in weblogic.policy Do Not Work if There Is No weblogic.xml File"

Section 11.26.7, "Enabling Both the Authentication and Passive Attributes In SML 2.0 Service Provider Services Is an Invalid Configuration"

Section 11.26.8, "Authentication May Fail When Group Membership Caching Is Enabled"

Section 11.26.9, "Oracle Internet Directory Authenticator Requires Tuning to Work Around Leaked Handles on Windows"

11.26.1 StoreBootIdentity Option Works Only if the Appropriate Server Security Directory Exists

The option -Dweblogic.system.StoreBootIdentity works only if the appropriate server security directory exists. This directory is usually created by the Configuration Wizard or upgrade tool.

However, the appropriate server security directory could be absent in domains checked into source-control systems.

11.26.2 Connections Requiring a NULL Cipher Will Fail Unless AllowUnencryptedNull Cipher is Set to True

WebLogic Server allows for a NULL cipher to be used with an SSL connection, which results in data not being encrypted.

In WebLogic Server 10.3 or greater, the use of the NULL cipher is now disabled by default. In order for a client to enable the NULL cipher, set the weblogic.ssl.AllowUnencryptedNullCipher system property to true. For example:

In WebLogic Server 10.3 or greater, client SSL connections requiring a NULL cipher will fail unless this system property explicitly enables the use of the NULL cipher. For NULL cipher to be used, you need to enable NULL cipher on both the server side and client side. If not enabled on both sides, the SSL handshake will fail.

11.26.3 WebLogic Server Instance Experiences Boot Time Failure with SecurityServiceException

A WebLogic Server instance can experience a boot time failure with a SecurityServiceException when the RDBMS Security Data Store is configured for a DB2 database using the DB2 driver supplied with WebLogic Server.

When RDBMS Security Data Store is using the AlternateId connection property for a DB2 database, you must also set the additional property BatchPerformanceWorkaround as true when using the DB2 driver supplied with WebLogic Server.

11.26.4 Authentication Failure After Upgrading a Domain From WLS 6.1

After upgrading a domain from WLS 6.1, the WebLogic Server instance will not boot due to an authentication failure.

A system user password must be set up in the WLS 6.1 domain before or after the upgrade process in order for the WebLogic Server instance to boot properly.

11.26.5 InvalidParameterException Message Generated and Displayed in the Administration Console

After you configure either the Identity Provider or Service Provider services for SAML 2.0 and attempt to publish the SAML 2.0 services metadata file, an InvalidParameterException message may be generated and displayed in the Administration Console.

When configuring the SAML 2.0 federation services for a WebLogic Server instance, be sure to enable all binding types that are available for the SAML role being configured. For example, when configuring SAML 2.0 Identity Provider services, you should enable the POST, Redirect, and Artifact bindings. When configuring SAML 2.0 Service Provider services, enable the POST and Artifact bindings. Optionally, you may choose a preferred binding.

11.26.6 Default Web Permissions in weblogic.policy Do Not Work if There Is No weblogic.xml File

If you define your default Web application permissions in weblogic.policy , but your Web application does not have a weblogic.xml descriptor file, the default Web permissions will not take effect, and you may see an AccessControlException .

Add a weblogic.xml descriptor file to your application.

11.26.7 Enabling Both the Authentication and Passive Attributes In SML 2.0 Service Provider Services Is an Invalid Configuration

When configuring SAML 2.0 Service Provider services, enabling both the Force Authentication and Passive attributes is an invalid configuration that WebLogic Server is unable to detect. If both these attributes are enabled, and an unauthenticated user attempts to access a resource that is hosted at the Service Provider site, an exception is generated and the single sign-on session fails.

Note that the Force Authentication attribute has no effect because SAML logout is not supported in WebLogic Server. So even if the user is already authenticated at the Identity Provider site and Force Authentication is enabled, the user is not forced to authenticate again at the Identity Provider site.

Avoid enabling both these attributes.

11.26.8 Authentication May Fail When Group Membership Caching Is Enabled

When configuring any of the authentication providers included in WebLogic Server, setting Group Membership Searching to "limited" may result in authentication failures if Enable Group Membership Lookup Hierarchy Caching is enabled. Authentication may succeed or fail depending on the current content of the group membership cache.

In the authentication provider configuration page of the WebLogic Server Administration Console, the Group Membership Searching attribute is available from the Provider Specific tab, and the Enable Group Membership Lookup Hierarchy Caching attribute is available from the Performance tab.

Note that the default settings for these attributes are as follows:

Group Membership Searching is set to "unlimited".

Enable Group Membership Lookup Hierarchy Caching is enabled.

These two configuration settings should not be used together. When configuring an authentication provider, use either of the following methods to avoid this problem:

Avoid setting Group Membership Searching to "limited".

If you must use the "limited" setting, disable the Enable Group Membership Lookup Hierarchy Caching setting. Note that disabling the group membership cache typically results in slower system performance.

11.26.9 Oracle Internet Directory Authenticator Requires Tuning to Work Around Leaked Handles on Windows

The connection from WebLogic Server to the LDAP server may develop a system resource consumption problem caused by a windows event handle memory leak. This problem occurs when numerous concurrent connections are made between WebLogic Server and the LDAP server under heavy load conditions. The workaround is to tune the LDAP Authentication provider that is configured in the security realm to pool all LDAP connections and, optionally, to enable caching in the user and group lookup algorithm.

Complete the following tuning procedures:

Set the LDAP connection pool size to 100 by defining the following system property in the setDomainEnv script, which is located in the bin directory of the WebLogic domain:

Optional) Configure the LDAP Authentication provider you are using—for example, the Oracle Internet Directory Authentication provider—to enable caching of group membership hierarchies.

In the WebLogic Administration Console:

Select the Performance tab of the LDAP Authentication provider configuration page ( Security Realms > myrealm > Providers > Authentication > your LDAP Authentication provider > Performance ).

Enable the attribute labeled Enable Group Membership Lookup Hierarchy Caching .

In the field labeled Max Group Hierarchies In Cache , specify a cache size large enough to hold most of the groups (a value of 1024 is recommended).

In the field labeled "Group Hierarchy Cache TTL," specify a sufficiently long time-to-live interval (a value of 6000 is recommended).

(Optional) Enable and enlarge the cache used with the LDAP server.

In the WebLogic Server Administration Console:

Select the Provider Specific tab of the LDAP Authentication provider configuration page ( Security Realms > myrealm > Providers > Authentication > your LDAP Authentication provider > Provider Specific ).

Scroll towards the bottom, and make sure the field labeled CacheEnabled is checked.

In the field labeled Cache Size , specify a value of 3200 KB.

In the field labeled Cache TTL , specify a time-to-live value that matches the Group Hierarchy Cache TTL value (set in Step 2d; 6000 is recommended).

Oracle also recommends that you set the results timeout value for the LDAP server. On the current Provider Specific configuration page, specify a value of 1000 ms in the field labeled Results Time Limit .

Restart WebLogic Server for the changes to take effect.

11.27 Spring Framework on WebLogic Server Issues and Workarounds

Section 11.27.1, "OpenJPA ClassFileTranformer Does Not Work When Running WebLogic Server on JRockit"

Section 11.27.2, "petclinic.ear Does Not Deploy on WebLogic Server"

11.27.1 OpenJPA ClassFileTranformer Does Not Work When Running WebLogic Server on JRockit

The OpenJPA ClassFileTranformer doesn't work when running WebLogic Server on JRockit.

Use an alternative method of applying enhancements at build time through an OpenJPA enhancer compiler; do not use the LoadTimeWeaver.

11.27.2 petclinic.ear Does Not Deploy on WebLogic Server

For the SpringSource 'petclinic' sample, the petclinic.war deploys without any problems. The petclinic.ear will not deploy on WebLogic Server because it is not packaged correctly. A request has been sent to SpringSource to fix the petclinic.ear packaging.

11.28 Upgrade Issues and Workarounds

This section describes the following issues:

Section 11.28.1, "Domains Created Using WebLogic Server 10.3.1 Cannot Be Run on WebLogic Server 10.3"

Section 11.28.2, "Issues with Domains Created After Rollback from WebLogic Server 10.3.2 to 10.3.1"

Section 11.28.3, "Downgrade Option is Unavailable in Smart Update After Upgrade to WebLogic Server 10.3.2"

11.28.1 Domains Created Using WebLogic Server 10.3.1 Cannot Be Run on WebLogic Server 10.3

If you create a domain using WebLogic Server 10.3.1, then roll back to WebLogic Server 10.3, you will not be able to start the servers that you created in that domain. This is a known restriction, as the config.xml file contains references to newer schema definitions ( xmlns.oracle.com ) that did not exist in WebLogic Server 10.3.

11.28.2 Issues with Domains Created After Rollback from WebLogic Server 10.3.2 to 10.3.1

After performing an upgrade from WebLogic Server 10.3.1 to WebLogic Server 10.3.2 using an upgrade installer or Smart Update, if you roll back to the 10.3.1 release (either with the WebLogic Server uninstaller Rollback option or via Smart Update), the following issues occur:

WebLogic Server starts, but validation errors occur

the Administration Console cannot be accessed (a 500 Error is displayed in the browser)

Note that these issues do not occur when upgrading from 10.3.0 to 10.3.2, and rolling back to 10.3.0.

The only known workaround is to restore the original WebLogic Server 10.3.1 installation, if it is backed up.

11.28.3 Downgrade Option is Unavailable in Smart Update After Upgrade to WebLogic Server 10.3.2

If you have WebLogic Server 10.3.0 or 10.3.1 installed with the WorkShop for WebLogic component, and you use Smart Update to upgrade to WebLogic Server 10.3.2, there is no Downgrade Option available in Smart Update that will allow you to roll back from 10.3.2 to the prior release.

Run the WebLogic Server uninstaller and select the Rollback option to roll back to the original WebLogic Server 10.3.0 or 10.3.1 installation. For information on how to run the WebLogic Server uninstaller, see the Installation Guide for Oracle WebLogic Server .

11.29 Web Applications Issues and Workarounds

Section 11.29.1, "Administration Console Fails to Implement session-timeout Changes"

Section 11.29.2, "Servers Cannot Load Sessions That Are Written by Patched Servers"

Section 11.29.3, "Unable to View the Output of a JSPX Page in Internet Explorer 7"

Section 11.29.4, "Unable to View the Output of SVG files in Internet Explorer 7"

11.29.1 Administration Console Fails to Implement session-timeout Changes

If the session-timeout is configured in the web.xml file, any changes made to change the session-timeout using the Administration Console do not take effect.

Use a deployment plan to override the session-timeout setting.

11.29.2 Servers Cannot Load Sessions That Are Written by Patched Servers

In WebLogic Server 11 g Release 1 Patch Set 1 (10.3.2), the session persistent formats for file and jdbc were changed. Therefore, if you have some servers in a cluster that have Patch Set 1 installed, while other servers do not, the servers without the patch cannot load sessions that were written by the patched servers. This also applies to unpatched servers in the same domain, when those servers are operating the same session persistent store as the patched servers. This issue occurs only when the application is deployed with a version ID and the session persistent type is either file or jdbc .

You can use either of the following workarounds for this issue.

Install Patch Set 1 on all servers at the same time.

Use the following system property to force the patched servers to persist sessions in the previous (pre-Patch Set 1) format:

-Dweblogic.servlet.session.PersistentBackCompatibility=true"

11.29.3 Unable to View the Output of a JSPX Page in Internet Explorer 7

When a JSPX page is deployed and is then accessed using Internet Explorer 7 (IE7), the XHTML source is displayed instead of the page contents. This occurs in both normal and osjp.next modes.

The application users should be instructed to use Firefox or Safari to access the application.

11.29.4 Unable to View the Output of SVG files in Internet Explorer 7

When a page using Scalar Vector Graphics is deployed and is then accessed using Internet Explorer 7 (IE7), the source is displayed instead of the page's graphic contents. This occurs in both normal and osjp.next modes.

Application developers should avoid using SVG graphics in their applications, as it is not natively supported in IE7. If used, a warning similar to the following should be added:

11.30 WebLogic Server Scripting Tool (WLST) Issues and Workarounds

Section 11.30.1, "Property Names Containing '.' Characters Are Not Supported by loadProperties Command"

Section 11.30.2, "Invalid cachedir Created by Jython Causes WLST to Error Out"

Section 11.30.3, "Server Fails to Start When Using the WLST startServer() Command"

11.30.1 Property Names Containing '.' Characters Are Not Supported by loadProperties Command

The WLST loadProperties command does not support loading a property with a name that contains "." characters. For example, if the property myapp.db.default is present in the property file, WLST throws a name exception:

This is a system limitation of Python and the loadProperties command. WLST reads the variable names and values and sets them as variables in the Python interpreter. The Python interpreter uses "." as a delimiter to indicate module scoping for the namespace, or package naming, or both. Therefore, the properties file fails because myapp.db.default.version=9i is expected to be in the myapp.db.default package. This package does not exist.

Use variable names that do not have periods. This will allow you to load the variables from the property file and refer to them in WLST scripts. You could use another character such as "_" or lowercase/uppercase character to delimit the namespace.

As an alternative, you can set variables from a properties files. When you use the variables in your script, during execution, the variables are replaced with the actual values from the properties file. For example:

This will work for one level of namespaces ( myapp.var1 , myapp.var2 ). It will not work for top level variables that share the same name as the namespace (for example, myapp=oracle and myapp.var1=10 ). Setting the myapp variable will override the myapp namespace.

If you need multiple levels, then you can define a package namespace using directories. Create a myapp/db/default directory with a vars.py file as follows:

Then import:

You may need to add __init__.py files to the subdirectories. Refer to the Python documentation for more information on packages:

http://docs.python.org/tut/node8.html

11.30.2 Invalid cachedir Created by Jython Causes WLST to Error Out

The default cachedir created by Jython 2.2 is not a valid directory. If you are using Jython directly from weblogic.jar , this causes WLST to error out.

There are two workarounds for this issue:

When invoking WLST, specify the -Dpython.cachedir=< valid_directory > parameter, or

Install Jython 2.2.1 separately instead of using the partial Jython that is included in weblogic.jar .

11.30.3 Server Fails to Start When Using the WLST startServer() Command

Any attempt to start a WebLogic Server Administration Server using the WLST startServer() command will fail when you (a) start WLST from an ORACLE_HOME/common/bin directory instead of WL_HOME/common bin and (b) run the startServer() command from that WLST shell.

The startServer() command can only be used to start a WebLogic Server Administration Server instance issued from a WLST shell that was initiated by WL_HOME/common/bin/wlst.cmd or wlst.sh, where WL_HOME is the WebLogic Server specific installation directory. startServer() cannot be used to start an integrated WebLogic Server Administration Server instance installed with other products in the Fusion Middleware Suite, such as SOA or JRF.

To start an integrated WebLogic Server Administration Server (one that is associated with a Fusion Middleware Suite product other than WebLogic Server), use either of the following methods:

Execute the server startup script for the associated domain.

Start the server using Node Manager. If you use this method, make sure that the startScriptEnabled property is set to true in Node Manager.

11.31 Web Server Plug-Ins Issues and Workarounds

This section describes the following issue:

Section 11.31.1, "MOD_WLS_OHS DOES NOT FAILOVER"

11.31.1 MOD_WLS_OHS DOES NOT FAILOVER

Currently, mod_wl and mod_wl_ohs only support container level failover and not application level failover. mod_wl_ohs continues to route requests to a down application as long as the managed server is up and running. In the clustered case, requests continue to go to the container where the original session started even when the application is shutdown, typically resulting in the http error 404.

11.32 Web Services and XML Issues and Workarounds

Section 11.32.1, "Sparse Arrays and Partially Transmitted Arrays Are Not Supported"

Section 11.32.2, "WSDL Compiler Does Not Generate Serializable Data Types"

Section 11.32.3, "Use of Custom Exception on a Callback"

Section 11.32.4, "Cannot Use JMS Transport in an Environment That Also Uses a Proxy Server"

Section 11.32.5, "clientgen Fails When Processing a WSDL"

Section 11.32.6, "JAX RPC Handlers in Callback Web Services Are Not Supported"

Section 11.32.7, "Message-level Security in Callback Web Services Is Not Supported"

Section 11.32.8, "Handling of Java Method Arguments or Return Parameters That Are JAX-RPC-style JavaBeans"

Section 11.32.9, "IllegalArgumentException When Using a Two-Dimensional XML Object in a JWS Callback"

Section 11.32.10, "Using SoapElement[] Results in Empty Array"

Section 11.32.11, "FileNotFound Exception When a Web Service Invokes Another Web Service"

Section 11.32.12, "Client Side Fails to Validate the Signature on the Server Response Message"

Section 11.32.13, "INFO Messages in Server Log for Domains Created Without Web Services-Specific Resources"

Section 11.32.14, "Sending async Responses and acks Using a Client Certificate Is Not Supported by Reliable Messaging"

Section 11.32.15, "xmlcatalog Element Entity Cannot Be a Remote File or a File in an Archive"

Section 11.32.16, "Catalog File's public Element Is Not Supported When Using XML Catalogs"

Section 11.32.17, "Local xmlcatalog Element Does Not Work Well"

Section 11.32.18, "JAXRPC Client Does Not Encode the HTTP SOAPAction Header With Multi-byte Characters"

Section 11.32.19, "External Catalog File Cannot Be Used in the xmlcatalog Element of a clientgen Task"

Section 11.32.20, "Exceptions When Running Web Services Reliable Messaging Under Heavy Load"

Section 11.32.21, "jwsc Has Been Modified, Resulting in Methods With No @WebMethod Annotation to Be Included in the Service Endpoint Interface"

Section 11.32.22, "MBean Encryption Property Setter Behavior Changed"

Section 11.32.23, "ClassNotFound Exception Occurs When Using wseeclient.jar to Execute a Standalone JAX-WS Client Application"

Section 11.32.24, "Incomplete Configuration When Adding WebLogic Server Advanced Web Services Component to Newly Created SOA Domain"

Section 11.32.25, "Exception Occurs During Invocation of Clientside Policy Applied to a Service"

Section 11.32.26, "Warning Occurs When Using webmethod in JWS"

11.32.1 Sparse Arrays and Partially Transmitted Arrays Are Not Supported

WebLogic Server does not support Sparse Arrays and Partially Transmitted Arrays as required by the JAX-RPC 1.1 Spec.

11.32.2 WSDL Compiler Does Not Generate Serializable Data Types

The Web Service Description Language (WSDL) compiler does not generate serializable data types, so data cannot be passed to remote EJBs or stored in a JMS destination.

11.32.3 Use of Custom Exception on a Callback

WebLogic Server does not support using a custom exception on a callback that has a package that does not match the target namespace of the parent Web Service.

Make sure that any custom exceptions that are used in callbacks are in a package that matches the target namespace of the parent Web service.

11.32.4 Cannot Use JMS Transport in an Environment That Also Uses a Proxy Server

You cannot use JMS transport in an environment that also uses a proxy server. This is because, in the case of JMS transport, the Web Service client always uses the t3 protocol to connect to the Web Service, and proxy servers accept only HTTP/HTTPS.

11.32.5 clientgen Fails When Processing a WSDL

clientgen fails when processing a WSDL that uses the complex type http://www.w3.org/2001/XMLSchema{schema} as a Web Service parameter.

11.32.6 JAX RPC Handlers in Callback Web Services Are Not Supported

WebLogic Server 9.2 and later does not support JAX RPC handlers in callback Web Services.

If JAX RPC handlers were used with Web Services created with WebLogic Workshop 8.1, then such applications must be redesigned so that they do not use callback handler functionality.

11.32.7 Message-level Security in Callback Web Services Is Not Supported

WebLogic Server 9.2 and later does not support message-level security in callback Web Services.

Web Services created with WebLogic Workshop 8.1 that used WS-Security must be redesigned to not use message-level security in callbacks.

11.32.8 Handling of Java Method Arguments or Return Parameters That Are JAX-RPC-style JavaBeans

WebLogic Server does not support handling of Java method arguments or return parameters that are JAX-RPC-style JavaBeans that contain an XmlBean property. For example, applications cannot have a method with a signature like this:

where myJavaBean class is like:

11.32.9 IllegalArgumentException When Using a Two-Dimensional XML Object in a JWS Callback

Using a two dimensional XmlObject parameter (XmlObject[][]) in a JWS callback produces an IllegalArgumentException .

11.32.10 Using SoapElement[] Results in Empty Array

Using SoapElement[] as a Web Service parameter with @WildcardBinding(className="javax.xml.soap.SOAPElement[]", binding=WildcardParticle.ANYTYPE) will always result in an empty array on the client.

Do not use the @WildcardBinding annotation to change the default binding of SOAPElement[] to WildcardParticle.ANYTYPE . The SOAPElement[] default binding is set to WildcardParticle.ANY .

11.32.11 FileNotFound Exception When a Web Service Invokes Another Web Service

When Web Service A wants to invoke Web Service B, Web Service A should use the @ServiceClient annotation to do this. If Web Service B needs a custom policy file that is not attached to the WSDL for Web Service B, then Web Service A will fail to run. Web Service A will look for the policy file at /Web-Inf/classes/policies/ filename .xml . Since no policy file exists at that location, WebLogic Server will throw a 'file not found' exception.

Attach the custom policy file to Web Service B, as in this example:

11.32.12 Client Side Fails to Validate the Signature on the Server Response Message

When the security policy has one of these Token Assertions, the client side may fail to validate the signature on the server response message.

In addition, when there are more than two certifications in the chain for X509 certification for <sp:WssX509Pkcs7Token11/> or <sp:WssX509Pkcs7Token10/> Token Assertion, the server side may fail to validate the signature on the incoming message.

A policy such as the following policy is not supported, unless the entire certificate chain remains on the client side.

Use either of the following two solutions:

Configure the response with the <sp:WssX509V3Token10/> Token Assertion, instead of WssX509PkiPathV1Token11/> . The policy will look like this:

Configure the response with the WssX509PkiPathV1Token11/> token assertion, but include it in the message. The policy will look like this:

When there are multiple certifications in the X509 Certificate chain, WssX509PkiPathV1Token11/> or <sp:WssX509PkiPathV1Token10/> should be used, instead of <sp:WssX509Pkcs7Token11/> or <sp:WssX509Pkcs7Token10/> .

11.32.13 INFO Messages in Server Log for Domains Created Without Web Services-Specific Resources

WebLogic Web Services expects that each WebLogic Server domain will contain specific resources needed to support Web services. Some domains, however, are not created with these resources.

For example, creating a default WebLogic Server domain in the configuration wizard (without applying any other templates) will not create the needed Web Services resources.

A domain that doesn't contain Web Services resources will still boot and operate correctly for non-Web services scenarios, and any Web Services scenario that doesn't involve asynchronous request/response. You will, however, see INFO messages in the server log indicating that async resources have not been configured and that the async response service for web services has not been completely deployed.

Web Services that use async request/response will not function properly in a domain that doesn't have Web Services resources configured in it. To configure these resources, there are two approaches:

Use the configuration wizard and apply the wls_webservice.jar template to your domain.

Manually configure these resources according to the rules given in the online documentation under domain configuration for Web services.

11.32.14 Sending async Responses and acks Using a Client Certificate Is Not Supported by Reliable Messaging

Reliable Messaging cannot support sending async responses and acks using a client certificate.

Web Services using async or Reliable Messaging will automatically use the server's SSL certificate when establishing a new connection (back from the receiving service to the sending service) for the purposes of sending async responses, acknowledgments, etc.

11.32.15 xmlcatalog Element Entity Cannot Be a Remote File or a File in an Archive

For the xmlcatalog element in build.xml , the location of an entity must be a file on the local file system. It cannot be a remote file (for example, http: ) or a file in an archive (for example, jar: ).

If necessary, define the remote element as an entity in a catalog file instead.

11.32.16 Catalog File's public Element Is Not Supported When Using XML Catalogs

The public element in a catalog file is not supported when using the XML Catalogs feature. It is not supported to be consistent with JAX-WS EntityResolver implementation. WebLogic Server only supports defining the system element in a catalog file.

11.32.17 Local xmlcatalog Element Does Not Work Well

The local xmlcatalog element does not work well due to an Ant limitation.

In the ant build.xml file, you have to define a local element above a clientgen(wsdlc) task when you are in the same target, or define the element out of any targets.

11.32.18 JAXRPC Client Does Not Encode the HTTP SOAPAction Header With Multi-byte Characters

The WebLogic Server Web Service JAXRPC client doesn't encode the HTTP SOAPAction header with multi-byte characters, but WebLogic Server only supports ASCII for HTTP headers.

Change the SOAP action to ASCII in the WSDL.

11.32.19 External Catalog File Cannot Be Used in the xmlcatalog Element of a clientgen Task

An external catalog file cannot be used in the xmlcatalog element of a clientgen task. For example, this snippet of an ant build file will not work:

This is a limitation of the Ant XML Catalog.

Resource locations can be specified either in-line or in an external catalog file(s), or both. In order to use an external catalog file, the xml-commons resolver library ( resolver.jar ) must be in your classpath. External catalog files may be either plain text format or XML format. If the xml-commons resolver library is not found in the classpath, external catalog files, specified in <catalogpath> paths, will be ignored and a warning will be logged. In this case, however, processing of inline entries will proceed normally.

Currently, only <dtd> and <entity> elements may be specified inline. These correspond to the OASIS catalog entry types PUBLIC and URI respectively.

11.32.20 Exceptions When Running Web Services Reliable Messaging Under Heavy Load

When running a Web services reliable messaging scenario under heavy load with file based storage that has the Direct-Write synchronous write policy setting, you may encounter IO exceptions similar to the following in the WebLogic Server log:

These exceptions are known to occur only when using Web Services reliable messaging. They indicate a failure to read a record from the file store and are considered 'fatal' data access errors.

The underlying issue causing these errors will be addressed in a future release.

The following workarounds are available for this issue:

Change the file store synchronous write policy to Cache-Flush .

Keep the Direct-Write synchronous write policy and add the following Java system property to your WebLogic server startup scripts:

With either of these workarounds, you may also want to set the block-size for the file store using the following Java system property:

Changing file store settings may lead to some performance degradation, but is necessary for correct operation of Web services reliable messaging under load.

For important information about these settings and additional options, see "Tuning File Stores" in Oracle Fusion Middleware Performance and Tuning for Oracle WebLogic Server .

11.32.21 jwsc Has Been Modified, Resulting in Methods With No @WebMethod Annotation to Be Included in the Service Endpoint Interface

Prior to 11 g Release 1 (WebLogic Server version 10.3.1), a JAX-WS JWS that allowed its service endpoint interface to be inferred from the implementation (that is, no explicit service endpoint interface class was declared) would have the implicit service endpoint interface include only those methods that included an @WebMethod annotation (and that annotation did not specify exclude=true ). This behavior is incorrect according to the JAX-WS 2.1 specification. JAX-WS 2.1 specifies that the service endpoint interface inferred from the JWS should include all public non-static methods on the JWS, as long as those methods do not have @WebMethod(exclude=true) attached to them.

In WebLogic Server 10.3.1, jwsc (and the Web services runtime) have been modified to properly generate the implicit service endpoint interface (and resulting WSDL for the service) according to the JAX-WS 2.1 specification. As a result, the implicitly derived service endpoint interface will include all non-excluded public non-static methods on the JWS. In some cases, you may have written JWS implementations that relied on the prior jwsc behavior, assuming that methods with no @WebMethod annotation would not be included in the service endpoint interface and resulting WSDL for the service. With the new jwsc behavior, such methods will be included in the service endpoint interface and resulting WSDL for the service.

After installing WebLogic Server 10.3.1 or greater, Oracle recommends that you evaluate your existing services for the following possible errors:

Public non-static methods that are not legal Web method declarations (these can cause jwsc to fail when building a service).

Public non-static methods that are legal Web methods, but were never intended to be exposed publicly on the service.

The two cases are described in detail here:

Case 1 : It is possible that some JWS classes will fail to compile in jwsc if a previously excluded method is an invalid Web method. The new implicit inclusion of such methods will cause the jwsc task to fail. There are many possible reasons for jwsc to fail compiling of a newly included Web method. The most common reason is if a method includes parameter types that are incompatible with JAXB (for example, an interface instead of a concrete class with a default no-arg constructor).

Case 2 : Any public non-static methods that are not explicitly excluded will now be represented in the service endpoint interface. These methods may be perfectly legal Web method declarations (for example, they compile correctly in jwsc ), but may never have been intended as public operations on the service.

Oracle recommends that you inspect any implicitly defined service endpoint interface (and dynamically generated WSDL) for their existing services, and ensure that only the intended methods are exposed.

In either of these cases, simply add the following annotation to the method that you want to exclude from the service's endpoint interface and WSDL:

11.32.22 MBean Encryption Property Setter Behavior Changed

In Oracle WebLogic Server 11 g Release 1 (10.3.1), the behavior of the MBean encryption algorithm changed.

In previous releases, if the newly set value was identical to the existing value, the encrypted value did not change. That is, you would always get the same encrypted value for a given password. The action was not treated as a non-dynamic change.

The behavior has been modified so that use of the setter on any existing encrypted value is considered to be a dynamic change, regardless of whether the new value matches the old value. Therefore, even if you set the password to the existing value, the setter now generates a different encrypted value for the given password.

11.32.23 ClassNotFound Exception Occurs When Using wseeclient.jar to Execute a Standalone JAX-WS Client Application

In some circumstances, when executing a standalone JAX-WS client application using wseeclient.jar (as described in "Using a Stand-Alone Client JAR File When Invoking Web Services" in Oracle Fusion Middleware Getting Started With JAX-WS Web Services for Oracle WebLogic Server ), the application may fail with a ClassNotFound exception. For example:

Use the client-side JAX-WS 2.1 that is integrated with the Java Standard Edition Release 6 (JDK 1.6), Update 4 and later. This requires using the JAX-WS API instead of any WebLogic Server specific APIS.

Current releases of JDK 1.6 are available for download at http://java.sun.com/javase/downloads/index.jsp . For information about writing a standalone JAX WS 2.1 client application, see the JAX-WS Users Guide on the JAX-WS 2.1 Reference Implementation Web site at https://jax-ws.dev.java.net/ .

11.32.24 Incomplete Configuration When Adding WebLogic Server Advanced Web Services Component to Newly Created SOA Domain

An incomplete configuration can result when you use the Configuration Wizard to add the WebLogic Server Advanced Web Services component to a newly created SOA domain. If you create a cluster that contains only the default 'out-of-the-box' soa_server1 server definition, the resulting cluster does not include the resources needed to run WebLogic Server Web Services in that cluster.

Use either of the following workarounds for this issue:

While running Configuration Wizard, create a second server in the cluster:

On the Select Optional Configuration screen, select Managed Servers, Clusters, and Machines .

On the Configure Managed Servers screen, add a managed server.

On the Assign Servers to Clusters screen, add this server to the cluster in which the default soa_server1 server resides.

On the Configuration Wizard Target Services to Servers or Clusters screen, target Web Services resources (for example, WseeJmsServer, WseeJmsModule) to the cluster.

Either of these workarounds will cause the Configuration Wizard to apply the resources for the WebLogic Server Advanced Web Services component to the cluster.

11.32.25 Exception Occurs During Invocation of Clientside Policy Applied to a Service

Included per base bug 9042616, RN bug 9056545, 10.3.2, Generic

When upgrading from WebLogic Server 11 g Release 1 (10.3.1) to WebLogic Server 11 g Patch Set 1 (10.3.2), if the value of the name attribute of @WebParam(header=true) is different from the Java parameter name in the JWS method, a WSDL part name exception may occur.

Run clientgen against the service to rebuild the client artifacts.

11.32.26 Warning Occurs When Using webmethod in JWS

When you use an inner class of an inner class as a parameter of webmethod in JWS, a warning occurs in the JWSC task.

Avoid using an inner class of an inner class as a parameter of webmethod in JWS.

11.33 WebLogic Tuxedo Connector Issues and Workarounds

Section 11.33.1, "View Classes are not Set on a Per Connection Basis"

11.33.1 View Classes are not Set on a Per Connection Basis

View classes are not set on a per connection basis.

A shared WebLogic Tuxedo Connector hash table can cause unexpected behavior in the server if two applications point to the same VIEW name with different definitions. There should be a hash table for the view classes on the connection as well as for the Resource section.

Ensure that all VIEW classes defined across all your WebLogic Workshop applications are consistent, meaning that you have the same VIEW name representing the same VIEW class.

11.34 Documentation Errata

This section describes documentation errata:

Section 11.34.1, "Issues With Search Function in the Samples Viewer"

Section 11.34.2, "Japanese Text Displays in Some Search Results Topics Avitek Medical Records"

Section 11.34.3, "Some Interfaces to SAML2 Are Not Documented in the MBean Reference"

Section 11.34.4, "Default Value Documented For JDBC TestConnectionsOnReserve Property Is Incorrect"

11.34.1 Issues With Search Function in the Samples Viewer

The Search function in the Samples viewer does not work when accessing the Examples documentation by selecting Oracle Weblogic > Weblogic Server > Examples > Documentation from the Windows Start menu.

To search the Sample Applications and Code Examples, you must start the Examples server and navigate to http://localhost:7001/examplesWebApp/docs/core/index.html. Click Instructions and then Search .

11.34.2 Japanese Text Displays in Some Search Results Topics Avitek Medical Records

The samples viewer Search function may sometimes return topics that display the Japanese and English versions of some Avitek Medical Records topics simultaneously.

11.34.3 Some Interfaces to SAML2 Are Not Documented in the MBean Reference

The WebLogic Server 10.3.1 MBean Reference does not document the interfaces to the SAML 2.0 Identity Asserter and SAML 2.0 Credential Mapping provider. Instead, Javadoc for these MBean interfaces is provided in the WebLogic Server 10.3.1 MBean API Reference Guide .

11.34.4 Default Value Documented For JDBC TestConnectionsOnReserve Property Is Incorrect

The "Test Connections on Reserve to Enable Fail-Over" section of Oracle Fusion Middleware Configuring and Managing JDBC for Oracle WebLogic Server states that the TestConnectionsOnReserve property is enabled (true) by default.

The actual default value of TestConnectionsOnReserve is false (disabled).

Scripting on this page enhances content navigation, but does not change the content in any way.

Thursday, June 20, 2019

Cannot start up weblogic and nodemanager after oracle cloud data center outage.

INFO: Notification sent for Mapping config object reloaded  

<Jul 16, 2018, 8:20:01,49 PM EDT> <Warning> <JMX> <BEA-149512> <JMX Connector Server started at service:jmx:iiop://adminhost.raastech.com:7002/jndi/weblogic.management.mbeanservers.editsession.DOMAIN.ServiceBus.>  

<Jul 16, 2018, 8:20:01,73 PM EDT> <Warning> <JMX> <BEA-149512> <JMX Connector Server started at service:jmx:iiop://adminhost.raastech.com:7002/jndi/weblogic.management.mbeanservers.edit.>  

<Jul 16, 2018, 8:20:01,147 PM EDT> <Warning> <JMX> <BEA-149512> <JMX Connector Server started at service:jmx:iiop://adminhost.raastech.com:7002/jndi/weblogic.management.mbeanservers.domainruntime.>  

Jul 16, 2018 8:20:01 PM oracle.ods.virtualization.engine.util.VDELogger info INFO: Notification sent for Mapping config object reloaded /u01/app/oracle/middleware/products/fmw1221/user_projects/domains/soa_domain/bin/startWebLogic.sh: line 203: 24671 Killed ${JAVA_HOME}/bin/java ${JAVA_VM} ${MEM_ARGS} -Dweblogic.Name=${SERVER_NAME} -Djava.security.policy=${WLS_POLICY_FILE} ${JAVA_OPTIONS} ${PROXY_SETTINGS} ${SERVER_CLASS}  

Stopping Derby server...  

Derby server stopped.

<Jul 16, 2018 8:21:11 PM EDT> <SEVERE> <Fatal error in NodeManager server> java.io.IOException: The server is unable to create a server socket for listening. The address soahost1.raastech.com might be incorrect or another process is using port 5556: java.net.BindException: Cannot assign requested address         at weblogic.nodemanager.server.NMServer.start(NMServer.java:351)         at weblogic.nodemanager.server.NMServer.main(NMServer.java:529)         at weblogic.NodeManager.main(NodeManager.java:31) Caused by: java.net.BindException: Cannot assign requested address         at java.net.PlainSocketImpl.socketBind(Native Method)         at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387)         at java.net.ServerSocket.bind(ServerSocket.java:375)         at java.net.ServerSocket.<init>(ServerSocket.java:237)         at javax.net.ssl.SSLServerSocket.<init>(SSLServerSocket.java:181)         at sun.security.ssl.SSLServerSocketImpl.<init>(SSLServerSocketImpl.java:140)         at sun.security.ssl.SSLServerSocketFactoryImpl.createServerSocket(SSLServerSocketFactoryImpl.java:95)         at weblogic.nodemanager.server.SSLListener.privilegedInit(SSLListener.java:134)         at weblogic.nodemanager.server.SSLListener.access$000(SSLListener.java:33)         at weblogic.nodemanager.server.SSLListener$1.run(SSLListener.java:97)         at java.security.AccessController.doPrivileged(Native Method)         at weblogic.nodemanager.server.SSLListener.init(SSLListener.java:94)         at weblogic.nodemanager.server.NMServer.start(NMServer.java:349)         ... 2 more

• Started WebLogic manually. No help.
• Increased debugging. No additional information.
• Reset the 'weblogic' password. No help.
• Cleared the ~/tmp ~/cache ~/data folders of the AdminServer. No help.
• Restored from backup. No help.
• This behavior appeared to be attributed to memory issues, so shut down every single service on the box. No help.

a. Stop the VM. b. Create a new VM. c. Mount the storage volumes on the new VM. d. Rename the hostname of the new VM. e. Everything will start up smoothly with no problems.

• Oracle WebLogic Server (10.3.6)
• Oracle Cloud Infrastructure (2019)

2 comments:

I really enjoyed your blog Thanks for sharing such an informative post.Looking For Some More Stuff. shuttering works

Interesting blog articles!

Post a Comment

Stack Exchange Network

Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Q&A for work

Connect and share knowledge within a single location that is structured and easy to search.

weblogic 12c node manager inactive

I am trying to start the node manager on Weblogic12c, but it is throwing me this error:

<Feb 23, 2017 3:59:33 AM EST> java.io.IOException: The server is unable to create a server socket for listening. The address omcsebsorc might be incorrect or another process is using port 5,556: java.net.BindException: Address already in use

How should I troubleshoot it?

Some other process is listening at the ip/port you specified for nodemanager (omcsebsorc:5556). Try to find out which process it is with

In the last column you can see the name an the PID of the listening process (only if you run this command as root or the process-owner). If this process is not the nodemgr process, find out if you need this process. If not, kill it and try to start your nodemgr. If you need it, you can set another port for nodemgr in you nodemanager.properties ( https://docs.oracle.com/cd/E13222_01/wls/docs81/adminguide/confignodemgr.html#1143157 )

If it is a nodemgr - process, you have already running one. Try to connect to your Adminserver and check if the nodemgr is running.

You must log in to answer this question.

Not the answer you're looking for browse other questions tagged weblogic ..

• The Overflow Blog
• Community Products Roadmap Update, July 2024
• Featured on Meta
• We spent a sprint addressing your requests — here’s how it went
• Upcoming initiatives on Stack Overflow and across the Stack Exchange network...

Hot Network Questions

• Is "necesse est tibi esse placidus" valid classical Latin?
• Optimizing Pi Estimation Code
• Can the differential be unitless while the variable have an unit in integration?
• Case insensitivity for Cyrillic characters in Apache .htaccess RegEx does not work
• Where am I wrong in my derivation of RC charging circuit equation?
• Did Joe Biden refer to himself as a black woman?
• What is the correct translation of the ending of 2 Peter 3:17?
• Do you always experience the gravitational influence of other mass as you see them in your frame?
• Challenge the appointment of the prime minister
• Book about a boy who becomes a sorcerer
• Are there alternative statistics to a p-value in NHST?
• Is it possible for some p-values to be impossible? (because statistic generated by parametric bootstrap is mostly the same value.)
• What makes Python better suited to quant finance than Matlab / Octave, Julia, R and others?
• How do I drill a 60cm hole in a tree stump, 4.4 cm wide?
• Air magic only used to decrease humidity and improve living conditions?
• Lengths of generators of surface group
• What is the difference, if any, between "en bas de casse" and "en minuscules"?
• Is the interpretation of a constant symbol an injective map?
• Tour de France General Classification time
• Would this telescope be capable to detect Middle Ages Civilization?
• Why did the main wire to my apartment burn before the breaker tripped?
• Plastic plugs used to fasten cover over radiator
• Weather on a Flat, Infinite Sea
• How to write a module that provides an 'unpublish comment' shortcut link on each comment

startNodeManager script: java.net.BindException: Cannot assign requested address: JVM_Bind (Doc ID 2328392.1)

Last updated on SEPTEMBER 27, 2023

Attempting to start Node Manager using startNodeManager.cmd (Windows) or startNodeManager.sh (Linux) results in the following nodemanager.log error:

The machine's IP address was changed, but its hostname remained the same.

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.

Javarevisited

Learn Java, Programming, Spring, Hibernate throw tutorials, examples, and interview questions

Topics and Categories

• collections
• multithreading
• design patterns
• interview questions
• data structure
• Java Certifications
• jsp-servlet
• online resources
• jvm-internals

Preparing for Java and Spring Boot Interview?

Join my Newsletter, its FREE

Thursday, September 28, 2023

Fixing java.net.bindexception: cannot assign requested address: jvm_bind in tomcat, jetty, how to resolve java.net.bindexception: cannot assign requested address: jvm_bind in tomcat.

• How to solve java.lang.ClassNotFoundException: com.mysql.jdbc.Driver in Java MySQL ? 
• Spring Boot Error - Error creating a bean with name 'dataSource' defined in class path resource DataSourceAutoConfiguration  
• How to fix @Autowired - No qualifying bean of type found for dependency in Spring Boot?  
• How to fix java.lang.ClassNotFoundException: org.postgresql.Driver error in Java? [ solution ]
• How to fix java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver Error in Java? [ solution ]
• java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory? [ solution ]
• How to solve java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver in Java? [ solution ]
• How to connect Oracle database from Java Program? ( example )
• How to solve java.lang.unsatisfiedlinkerror no ocijdbc11 in java.library.path? ( solution )

7 comments :

Hello there I am getting below exception, while running QuickFIXJ based FIX engine : Caused by: java.net.BindException: Cannot assign requested address at sun.nio.ch.Net.bind0(Native Method) at sun.nio.ch.Net.bind(Net.java:444) at sun.nio.ch.Net.bind(Net.java:436) at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214) at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) at org.apache.mina.transport.socket.nio.SocketAcceptor.registerNew(SocketAcceptor.java:363) at org.apache.mina.transport.socket.nio.SocketAcceptor.access$800(SocketAcceptor.java:55) at org.apache.mina.transport.socket.nio.SocketAcceptor$Worker.run(SocketAcceptor.java:222) at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51) at java.lang.Thread.run(Thread.java:724) It runs fine on my desktop but as soon as I try to run it on Linux, it gives me this exception, I have already check no other instance of program is running and no other process is using this port.

@Anonymous ..Most likely related to another process using port . On Windows, run the command: netstat -a -n | find "LIST" And it should list anything there that's hogging the port. Of course you'll then have to go and manually kill those programs in Task Manager. If this still doesn't work, replace the line: serverSocket = new ServerSocket(9999); With: InetAddress locIP = InetAddress.getByName("192.168.1.20"); serverSocket = new ServerSocket(9999, 0, locIP); Of course replace 192.168.1.20 with your actual IP address, or use 127.0.0.1.

-Djava.net.preferIPv4Stack=true could also help (if worked for me adding this to my tomcat settings)

Verify ipaddress in /etc/init.d/jbossas if Jboss is configured as a service.

PLS help me im 12, but i know a lot about coding and want to host a minecrt server.... However this error keeps popping up when i try to run it :( [12:45:57] [Server thread/INFO]: Using default channel type [12:45:59] [Server thread/WARN]: **** FAILED TO BIND TO PORT! [12:45:59] [Server thread/WARN]: The exception was: java.net.BindException: Cannot assign requested address: bind [12:45:59] [Server thread/WARN]: Perhaps a server is already running on that port? i went to C:\Windows\System32\drivers\etc\hosts also and it just says # Copyright (c) 1993-2009 Microsoft Corp. # # This is a sample HOSTS file used by Microsoft TCP/IP for Windows. # # This file contains the mappings of IP addresses to host names. Each # entry should be kept on an individual line. The IP address should # be placed in the first column followed by the corresponding host name. # The IP address and the host name should be separated by at least one # space. # # Additionally, comments (such as these) may be inserted on individual # lines or following the machine name denoted by a '#' symbol. # # For example: # # 102.54.94.97 rhino.acme.com # source server # 38.25.63.10 x.acme.com # x client host # localhost name resolution is handled within DNS itself. # 127.0.0.1 localhost # ::1 localhost please read carefully and help me play minecraft with my friends

Hello there, which port you are trying to run your server? use a port which is greater than 999, also check if another process, previous instance of same is running on that port. The error indicates invalid port or an already running instance.

Post a Comment

• Everything Bundle (Java + Spring Boot + SQL Interview) for a discount
• Grokking the Java Interview
• Grokking the Spring Boot Interview
• Spring Framework Practice Questions
• Grokking the SQL Interview
• Grokking the Java Interview Part 2
• Grokking the Java SE 17 Developer Certification (1Z0-829 Exam)
• Spring Professional Certification Practice Test
• Java SE 11 Certification Practice Test
• Azure Fundamentals AZ-900 Practice Test
• Java EE Developer Exam Practice Test
• Java Foundations 1Z0-811 Exam Practice Test
• AWS Cloud Practitioner CLF-C02 Exam Practice Test
• Java SE 17 1Z0-829 Exam Practice Test
• Azure AI-900 Exam Practice Test
• 1Z0-829 Java Certification Topic wise Practice Test

My Newsletter articles

• How to grow financially as Software Engineer?
• Difference between Microservices and Monolithic Architecture
• What is Rate Limiter? How does it work
• Difference between @Component vs @Bean annotations in Spring Framework?
• Top 10 Software Design Concepts Every Developer should know
• How does SSO Single Sign On Authentication Works?

Search This Blog

Interview Questions

• core java interview question (182)
• interview questions (102)
• data structure and algorithm (90)
• Coding Interview Question (81)
• spring interview questions (50)
• design patterns (47)
• object oriented programming (38)
• SQL Interview Questions (36)
• thread interview questions (30)
• collections interview questions (26)
• database interview questions (16)
• servlet interview questions (15)
• hibernate interview questions (8)
• Programming interview question (6)

Java Tutorials

• date and time tutorial (25)
• FIX protocol tutorial (16)
• Java Certification OCPJP SCJP (30)
• java collection tutorial (91)
• java IO tutorial (30)
• Java JSON tutorial (21)
• Java multithreading Tutorials (63)
• Java Programming Tutorials (21)
• Java xml tutorial (16)
• jsp-servlet (37)
• online resources (205)

Get New Blog Posts on Your Email

Get new posts by email:.

• courses (253)
• database (49)
• Eclipse (35)
• JVM Internals (27)
• JQuery (22)
• Testing (21)
• general (15)

Blog Archive

• ►  July (5)
• ►  June (9)
• ►  May (45)
• ►  April (53)
• ►  March (12)
• ►  February (4)
• ►  January (60)
• ►  December (30)
• ►  November (7)
• ►  October (13)
• 10 Exception handling Best Practices in Java Progr...
• How to Fix Exception in thread "main" java.lang.Ex...
• How to fix java.io.FileNotFoundException: (Access ...
• How to resolve java.lang.UnsupportedClassVersionEr...
• How to fix java.lang.NoSuchMethodError: main Excep...
• Polymorphism and Inheritance Example in Java
• How to deal with NullPointerException in Java with...
• Fixing java.net.BindException: Cannot assign reque...
• How to Fix java.net.ConnectException: Connection r...
• How to solve java.util.NoSuchElementException in J...
• How to fix java.lang.ClassNotFoundException: org.a...
• Top 10 DevOps Certifications for Experienced IT Pr...
• [Solved] How to find and Print Armstrong number be...
• Java Program to Multiply Two Matrices - Matrix Mul...
• [Solved] How to Implement Binary Search in Java wi...
• Top 20 Amazon and Google Programming Interview Que...
• How to find the largest and smallest number in giv...
• What are AtomicInteger and AtomicLong in Java? How...
• How to Implement Stack data structure in Java? Exa...
• How to check if a given Number is Binary in Java? ...
• How to find Middle Element of Linked List in Java ...
• How to find the 3rd (Kth) Node from end of linked ...
• How to Remove a character from String in Java ? Re...
• How to Print Pyramid Pattern of Alphabet Character...
• What is LongAdder, AtomicLong, and LongAccumulator...
• How to calculate large factorial using BigInteger ...
• [Solved] How to find Largest Prime Factor of a Num...
• 3 ways to swap two Numbers without using Temp or T...
• Java 8 Compute(), ComputeIfAbsent() and ComputeIfP...
• How to Find Largest and Smallest of N numbers with...
• How to Remove Duplicate Characters from String in ...
• How to generate Prime numbers in Java? Sieve of Er...
• Fibonacci Series in Java using Recursion and Itera...
• Quicksort Sorting Algorithm in Java - In Place Exa...
• How to Find Multiple Missing Integers in Given Arr...
• Top 30 Linked List Algorithm Questions from Progra...
• How to Print Fibonacci Series in Java without Recu...
• 3 ways to sort an ArrayList in Java without using ...
• How to fix class file has wrong version 61.0, shou...
• 2 Ways to check If String is Palindrome in Java? R...
• How to Convert Fahrenheit to Celsius in Java with ...
• How to print 1 to 100 without using loop in Java? ...
• How to Convert Binary Number to Decimal in Java - ...
• Double Checked Locking on Singleton Class in Java ...
• How to check if a number is a palindrome or not in...
• How to Count Occurrences of a Character in String ...
• 4 Ways to Convert String to long in Java? Example ...
• How to print Floyd's Triangle in Java with Example
• How to Check if two Rectangles Overlap in Java? Co...
• How to Find Missing Number on Integer Array of 1 t...
• How to calculate area of Triangle in Java - Exampl...
• How to get User input from Console and command lin...
• How to debug Servlet, JSP based Java Web Applicati...
• How to Find All Permutations of String in Java usi...
• How to find duplicate words in Java String? [Solut...
• Bubble Sort Algorithm in Java with Example
• How to Find Largest of Three Integers in Java - Al...
• 3 ways to parse String to float in Java? Examples
• Why Dependency Injection is a Best Practice?
• 15+ Spring Framework Quizzes for Java Programmers ...
• How to print pyramid pattern of stars and numbers ...
• How to Find Prime Factors of Integer Numbers in Ja...
• How to Count number of Set bits or 1's of Integer ...
• How to Add Two Integer Numbers without using Plus ...
• How to Check if Integer Number is Power of Two in ...
• Java Program to find factorial of number in Java -...
• How to choose a Collection class in Java? Flowchar...
• How to Check If Number is Even or Odd without usin...
• Java Program to print Prime numbers in Java - Exa...
• Java Program to Find Sum of Digits in a Number usi...
• Difference between @RunWith vs @ExtendWith Annotat...
• Java Program to Reverse an Integer Number - Exampl...
• How to Count Number of Words in String ? Java Codi...
• How to Reverse String in Java Using Iteration and ...
• Top 20 String Algorithm Questions from Coding Inte...
• How to check if two String are Anagram in Java - P...
• How to delete a directory with files in Java - Exa...
• How to resolve java.lang.ClassNotFoundException in...
• 9 Maven Concepts and Tools Every Java Developers S...
• Where and How to download Spring Framework JAR fil...
• Tibco Tutorial : Http Interface for Tibco RV Issue...
• FIX protocol Tutorial: Futures and Options
• What is Atomic Operation and Variable in Java? Ato...
• Top 12 Locking, Synchronization and Multithreading...
• What is happens-before in Java Concurrency? An exa...
• Top 15 Java Multithreading, Concurrency Interview ...
• How to avoid deadlock in Java? Example Tutorial an...
• Top 50 Java Thread and Concurrency Interview Quest...
• Inter Thread Communication in Java using wait() an...
• How to use Lock in Java? ReentrantLock Example Tut...
• Difference between Executor, ExecutorService and E...
• Difference between @Transactional and @EnableTrans...
• What is CyclicBarrier in Java? How and When to use...
• Difference between atomic, volatile and synchroniz...
• How Thread, Code and Data Works in Multi-threading...
• How Volatile in Java works? Example of volatile ke...
• Top 5 Java Multithreading and Concurrency Courses ...
• How to create Thread Pool in Java using Executor F...
• How to use Callable and Future in Java? Example Tu...
• How to use wait, notify and notifyAll in Java - Pr...
• ►  August (55)
• ►  July (51)
• ►  June (4)
• ►  May (206)
• ►  April (137)
• ►  March (36)
• ►  February (12)
• ►  January (11)
• ►  December (6)
• ►  November (1)
• ►  September (1)
• ►  August (25)
• ►  July (45)
• ►  June (33)
• ►  May (15)
• ►  April (37)
• ►  March (7)
• ►  February (17)
• ►  January (23)
• ►  December (69)
• ►  November (38)
• ►  October (23)
• ►  September (46)
• ►  August (153)
• ►  July (238)
• ►  June (2)
• ►  May (1)
• ►  April (3)
• ►  March (6)
• ►  February (2)
• ►  January (2)
• ►  December (1)
• ►  October (1)
• ►  August (1)
• ►  June (1)
• ►  May (5)
• ►  April (13)
• ►  March (5)
• ►  February (3)
• ►  November (4)
• ►  July (2)
• ►  April (1)
• ►  July (1)
• Privacy Policy
• Terms and Conditions