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IT24527: FDCs reporting hrcE_LOG_FULL followed by arcE_OBJECT_DAMAGED after restarting queue manager

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APAR status

  • Closed as program error.

Error description

  • Failure Data Capture (FDC) records are generated indicating LOG
    FULL are reported during queue manager shutdown.
    The following FDCs indicating object damage might also be
    generated upon queue
    manager restart.
    
    HL010004 hlgReserveLogSpace hrcE_LOG_FULL
    HL006009 hlgWriteLogRecord hrcE_LOG_FULL
    AL047010 alsCheckPointLoop arcW_MSG_LOG_TOO_SMALL
    AQ123002 aqqLoadMsgHdr arcE_OBJECT_DAMAGED
    AQ060020 aqhLoadMsgChain arcE_OBJECT_DAMAGED
    AQ123002 aqqLoadMsgHdr arcE_OBJECT_DAMAGED
    AQ060020 aqhLoadMsgChain arcE_OBJECT_DAMAGED
    
    MQM Function Stack
    amqzxma0
    zxcExecutionController
    kpiShutdown
    apiShutdown
    aocPerformShutdown
    aqmShutdownQueue
    aqhCompactQueue
    aqhMoveMessage
    aqqCopyMsg
    aqqWriteMsgData
    aqlReservePutSpace
    almReserveSpace
    hlgReserveLogSpace
    xcsFFST
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of IBM MQ and likely when the queue depth is high.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    An error condition when compacting queue file data structures
    during shutdown was not correctly handled. This led to a failure
    to check that there was sufficient log space available to
    continue with the compaction. If the log space was exhausted
    during queue compaction, the potential existed for the queue
    file being compacted to become damaged.
    

Problem conclusion

  • The queue manager's queue compaction routines has been modified
    to add an additional check during queue compaction.
    
    This is an extension of checks added previously under APAR
    IT16268, which fixed a separate logic error in  queue compaction
    routines that might cause object damage.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v8.0       8.0.0.11
    v9.0 LTS   9.0.0.5
    
    
    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

    IT24527

  • Reported component name

    IBM MQ BASE MP

  • Reported component ID

    5724H7251

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-03-25

  • Closed date

    2018-06-28

  • Last modified date

    2018-06-28

  • 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

    IBM MQ BASE MP

  • Fixed component ID

    5724H7251

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0.0.0","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
28 June 2018