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PH02564: PH02564: Outstanding request counters have incorrect values

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APAR status

  • Closed as program error.

Error description

  • Add missing locking when changing outstanding request
    counters
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server WAS ND edition- Virtual              *
    *                  Enterprise/IM Component                     *
    ****************************************************************
    * PROBLEM DESCRIPTION: Request load may not be correctly       *
    *                      distributed across servers because      *
    *                      outstanding request counts for those    *
    *                      servers are incorrect                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Distributing the request load requires determining how loaded
    the available machines are to send requests to a less loaded
    server.  Since the counters for how many requests each server
    has been send are getting corrupted we make bad decisions and
    send traffic to servers that may not be the best choice to
    receive those requests.
    

Problem conclusion

  • Outstanding request counters were corrupted because multiple
    threads could update the counters simultaneously. This behavior
    has been corrected so that the counters have the correct values
    which leads to the expected routing decisions being made.
    
    The fix for this APAR is currently targeted for inclusion in fix
    pack 9.0.0.10.  Please refer to the Recommended Updates page for
    delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH02564

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-09-10

  • Closed date

    2018-10-04

  • Last modified date

    2018-10-15

  • 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

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels



Document information

More support for: WebSphere Application Server
General

Software version: 900

Reference #: PH02564

Modified date: 15 October 2018


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