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IT14314: MQ GENERATES FDC WITH PROBE ID XC514090 FROM XLSRWMUTEXREQUEST REPORTING XECL_W_LONG_LOCK_WAIT

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APAR status

  • Closed as program error.

Error description

  • WMQ version 7.5 onwards generates a failure data capture (FDC)
    record with probe id XC514090 from xlsRWMutexRequest with the
    following stack:
    MQM Function Stack
    MQCLOSE
    zstMQCLOSE
    zifMQCLOSE
    zsqMQCLOSE
    kpiMQCLOSE
    kqiCloseIt
    kqiCloseTopic
    kqiTopicDeregisterSubscriber
    xlsRWMutexRequest
    xcsFFST
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users of WebSphere MQ 7.5 using publish/subscribe messaging
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    A logic error in the publish/subscribe broker within the MQ
    queue manager presented a timing window which could cause a
    subscription lock count to be recorded incorrectly. This would
    then mean that the lock was not fully released, which would in
    turn prevent the MQCLOSE operation associated with that
    subscription from completing successfully, resulting an FDC
    record with probe id XC514090 xecL_W_LONG_LOCK_WAIT.
    

Problem conclusion

  • The lock count mechanism within the publish/subscibe broker of
    the MQ queue manager has been corrected.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.5       7.5.0.8
    
    The latest available maintenance can be obtained from
    'WebSphere MQ Recommended Fixes'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
    
    If the maintenance level is not yet available information on
    its planned availability can be found in 'WebSphere MQ
    Planned Maintenance Release Dates'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT14314

  • Reported component name

    WMQ BASE MULTIP

  • Reported component ID

    5724H7241

  • Reported release

    750

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-03-15

  • Closed date

    2016-11-11

  • Last modified date

    2016-11-11

  • 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

    WMQ BASE MULTIP

  • Fixed component ID

    5724H7241

Applicable component levels

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSCPQ63","label":"APAR \/ Maintenance"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.5","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
11 November 2016