PM52580: Object grid RemoteCacheLoader threads are excessively created and destroyed, which can lead to out of memory exceptions.

APAR status

• Closed as program error.

Error description

• OGRemoteCacheLoader threads are excessively created and
  destroyed, which can lead to out of memory errors.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Users of WebSphere eXtreme Scale who use    *
  *                  the AgentManager function.                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: The thread pool used to dispatch        *
  *                      AgentManager work to applicable         *
  *                      partitions had a minimum value less     *
  *                      than the maximum value.                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When the minimum and maximum value of a thread pool do not
  match, the threads can be deleted and recreated again when
  more threads are needed.  This behavior creates more native
  threads on the operating system, which can lead to issues with
  not being able to create threads.  When Java cannot create a
  thread, it throws an OutOfMemoryException exception.  This type
  of condition is usually seen when the operating system is
  configured with a restrictive ulimit setting.
  

Problem conclusion

• The thread pool was updated to have a minimum and maximum set
  to the same value of 50, and it was made configurable using the
  system properties
  com.ibm.websphere.xs.commandDispatchMinThreads and
  com.ibm.websphere.xs.commandDispatchMaxThreads to override the
  minimum and maximum thread pool size.  The thread names also
  changed from being called OGRemoteCacheLoader threads to
  being called WXSCommandDispatch threads.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  XD EXTREME SCAL

• Fixed component ID

  5724J3402

Applicable component levels

• R710 PSY

     UP