PM65121: The ClassNotFoundException occurs when you update or delete with the invalidate flag, while using copy_to_bytes

Download WebSphere eXtreme Scale Version 8.5 Fix Pack 1 server upgrade

APAR status

• Closed as program error.

Error description

• WebSphere eXtreme Scale does not provide an adequate error
  message when it cannot load a user class and you have
  configured optimistic locking in the COPY_TO_BYTES copy mode.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  WebSphere eXtreme Scale users who use       *
  *                  optimistic locking and the COPY_TO_BYTES    *
  *                  copy mode.                                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: An adequate error message is not        *
  *                      displayed when a class fails and        *
  *                      optimistic locking is configured for    *
  *                      COPY_TO_BYTES.                          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Normally, user classes are not required on the container
  server when using the COPY_TO_BYTES copy mode.  However, when
  you use optimistic locking in its default mode, the container
  server must deserialize the object from its byte array to
  invoke the equals() method.  This requires that the user class
  file be loadable by the container server.
  You can also choose to use the built-in
  NoVersioningOptimisticCallback plug-in or a custom serializer
  plug-in to avoid loading the user class on the container
  server.  Likewise, switching the locking mode to something
  other than optimistic locking prevents this problem.
  

Problem conclusion

• When you encounter this problem, the container server provides
  a more useful error message, and the infocenter
  documentation has been updated to further describe this
  situation.
  

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

  WS EXTREME SCAL

• Fixed component ID

  5724X6702

Applicable component levels

• R850 PSY

     UP