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IZ90257: If triggering is set for SYSTEM.AUTH.DATA.QUEUE, the OAM may hang when performing authorization checks.

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APAR status

  • Closed as program error.

Error description

  • After enabling triggering on SYSTEM.AUTH.DATA.QUEUE, trying to
    create a queue, or other similar operations requiring
    authorization checks, may cause the OAM, and hence the queue
    manager, to hang.
    
    Forcing an FDC to be created using "kill -SIGUSR2" on the hung
    MQ process for amqzfuma will produce the following FDC, or
    similar (basically, a hang in function aouLockObjectCatalogue
    waiting for a lock):
    
    Probe Id          :- XC307255
    Component         :- xlsRequestMutex
    Program Name      :- amqzfuma
    Major Errorcode   :- OK
    Minor Errorcode   :- OK
    Probe Type        :- INCORROUT
    Probe Description :- AMQ6109: An internal WebSphere MQ error has
    occurred.
    
    MQM Function Stack
    zfuProcessMessage
    zfuSetObjectAuthority
    zfuCreateNewObjectAuth
    zfuWriteAuthRecord
    MQPUT
    zstMQPUT
    zifMQPUT
    zsqMQPUT
    kpiMQPUT
    kqiPutIt
    kqiPutMsgSegments
    kqiTriggerOnPut
    apiEnquireObject
    aouLockObjectCatalogue
    xcsRequestMutexSem
    xlsRequestMutex
    xcsFFST
    

Local fix

  • Disable triggering on SYSTEM.AUTH.DATA.QUEUE.
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    A user who enables triggering on SYSTEM.AUTH.DATA.QUEUE is
    likely to encounter this problem.
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    Enabling triggering on SYSTEM.AUTH.DATA.QUEUE is likely to
    result in a recursive attempt to lock the object catalogue, and
    hence a hang (deadlock). In the design of the OAM it was not
    anticipated that triggering would be set on
    SYSTEM.AUTH.DATA.QUEUE.
    

Problem conclusion

  • The OAM has been changed to ignore any triggering set for
    SYSTEM.AUTH.DATA.QUEUE.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v6.0
    Platform           Fix Pack 6.0.2.11
    --------           --------------------
    Windows            U200326
    AIX                U839822
    HP-UX (PA-RISC)    tbc_p600_0_2_11
    HP-UX (Itanium)    U840690
    Solaris (SPARC)    U840686
    Solaris (x86-64)   U840693
    iSeries            tbc_p600_0_2_11
    Linux (x86)        U840687
    Linux (x86-64)     U840692
    Linux (zSeries)    U840688
    Linux (Power)      U840689
    Linux (s390x)      U840691
    
                       v7.0
    Platform           Fix Pack 7.0.1.5
    --------           --------------------
    Windows            U200324
    AIX                U839183
    HP-UX (PA-RISC)    U839621
    HP-UX (Itanium)    U839626
    Solaris (SPARC)    U839622
    Solaris (x86-64)   U839628
    iSeries            tbc_p700_0_1_5
    Linux (x86)        U839623
    Linux (x86-64)     U839627
    Linux (zSeries)    U839624
    Linux (Power)      U839625
    
    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

    IZ90257

  • Reported component name

    WMQ LIN X86 V6

  • Reported component ID

    5724H7204

  • Reported release

    602

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-12-07

  • Closed date

    2011-01-25

  • Last modified date

    2011-01-25

  • 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 LIN X86 V6

  • Fixed component ID

    5724H7204

Applicable component levels

  • R602 PSY

       UP

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Document Information

Modified date:
25 January 2011