Skip to main content

         This documentation site is for previous versions. Visit our new documentation site for current releases.      

This content has been archived and is no longer being updated.

Links may not function; however, this content may be relevant to outdated versions of the product.

Use IBM FixPack1 for WebSphere 5.1 installations

Updated on December 29, 2004


For certain platforms, a bug in IBM WebSphere 5.1 may prevent Process Commander from running. This problem appears when a user first logs on and tries to display a portal.

Tracebacks on this issue report that the same object is being released into the StringBufferFactory multiple times.


The issue occurs because of a bug in IBM's Java 1.4.1 just-in-time (JIT) compiler.  This error is known to occur on Windows systems, and may also occur on AIX, Linux, and z/OS systems, which share similar IBM JIT technology. It should not be an issue on Solaris, as WebSphere uses an IBM-modified version of Sun's JVM for that platform.

Disabling the JIT allows Process Commander to run correctly, but the performance is so slow as to be unusable.



Applying WebSphere 5.1 fix pack 1 (also known as WebSphere 5.1.1) upgrades the IBM JVM version to 1.4.2 (cn1420-20040626 on Windows). This JVM fixes the problem, and allows Process Commander to run correctly under WebSphere.

This fixpack is available at WWW

Have a question? Get answers now.

Visit the Support Center to ask questions, engage in discussions, share ideas, and help others.

Did you find this content helpful?

Want to help us improve this content?

We'd prefer it if you saw us at our best. is not optimized for Internet Explorer. For the optimal experience, please use:

Close Deprecation Notice
Contact us