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

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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 number

    PM65121

  • Reported component name

    WS EXTREME SCAL

  • Reported component ID

    5724X6702

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-05-21

  • Closed date

    2012-05-22

  • Last modified date

    2012-05-22

  • 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



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Document information


More support for:

WebSphere eXtreme Scale

Software version:

850

Reference #:

PM65121

Modified date:

2012-05-22

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