Debugging this problem involves disabling the JIT compiler
and enabling JNI tracing. Verbose JNI trace reports information about use
of native methods and other Java Native Interface activity.
Follow the section that applies to the version of WebSphere Application
Server that is installed on your system.
For releases of WebSphere Application Server V5:
- How
to disable Just-In-Time (JIT) compiler
- How to enable verboseJNI:
- In the administrative client, expand Servers, then click on
Application Servers.
- Click on the server that is encountering the problem.
- Under the Additional Properties section, click Process
Definition.
- Under the Additional Properties section, click Java Virtual
Machine.
- Place a check mark next to Verbose JNI.
- Click apply.
- At the top of the administrative client, click Save to save the
changes to your configuration.
- Stop and start the application server.
- The verbose JNI output will be placed in the
native_stderr.log file for the application server.
For releases of WebSphere Application Server V4.0:
- How
to disable Just-In-Time (JIT) compiler
- How to enable verboseJNI on Advanced Edition
- In the administrative client, navigate to the application server and
select it.
- Click on the JVM™ Settings tab.
- Click Advanced JVM Settings.
- Check the box verbose JNI.
- Click OK.
- Click apply.
- Stop and start the application server.
- The verbose JNI trace will be placed in the stderr file for
the Application Server
- How to enable verboseJNI on Advanced Edition Single Server
- In the administrative client, expand your node and then expand the
application servers folder.
- Select the application server and expand it.
- Expand Process Definition.
- Select JVM Settings.
- Place a check mark next to verbose JNI.
- Click OK.
- At the top of the administrative client, click Save to save the
changes to your configuration.
- Stop and start the application server.
- The verbose JNI trace will be placed in the stderr file for
the Application Server
Note: Verbose JNI trace logs to the application server
native_stderr file in releases of WebSphere Application Server V5
and stderr in releases of WebSphere Application Server V4.
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