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IZ33632: Hung queue manager after applying FixPack 6.0.2.4 or 6.0.2.5, if SYSTEM.AUTH.DATA.QUEUE is unexpectedly missing some records

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APAR status

  • Closed as program error.

Error description

  • The queue manager is hung: there is no response from attempts
    to create or delete queue manager objects, and any
    authorizations required through the OAM are unresponsive. The
    hung state may extend to other aspects of the queue manager.
    
    If the thread stack of the OAM process (amqzfuma) shows:
    
    zfuProcessMessage
    zfuCopyObjectAuthority
    zfuLockHashTable
    xcsRequestMutexSem
    
    then this APAR is a match. The issue applies to FixPacks
    6.0.2.4 and 6.0.2.5.
    
    This stack can be viewed for example on Unix by issuing the
    SIGUSR2 signal to the process and examining the resulting
    informational FDC.
    
    Many xecL_W_LONG_LOCK_WAIT FDCs are also likely to get written,
    though they are not in themselves specifically indicative of
    this issue.
    
    The problem is timing related and so its occurrence is
    unpredictable.
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users with FixPack 6.0.2.4 or 6.0.2.5 applied may be impacted
    by this problem, if the SYSTEM.AUTH.DATA.QUEUE is unexpectedly
    missing some records. This problem was inadvertently caused by
    a change made for APAR IZ06131, and so the users affected for
    this APAR IZ33632 will be those who would be affected by APAR
    IZ06131:
    "All users that expecting to have the necessary access to the
    queue manager, queues and other objects, but are experiencing
    authorizations errors connecting to a queue manager, opening
    queues, putting or getting messages etc."
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    The problem was caused by an inadvertent possible deadlock
    introduced by the change for IZ06131.
    

Problem conclusion

  • Corrected the locking of the change for IZ06131 to eliminate
    the deadlock possibility.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v6.0
    Platform           Fix Pack 6.0.2.6
    --------           --------------------
    Windows            U200299
    AIX                U819350
    HP-UX (PA-RISC)    U819028
    HP-UX (Itanium)    U819230
    Solaris (SPARC)    U819232
    Solaris (x86-64)   U819240
    iSeries            tbc_p600_0_2_6
    Linux (x86)        U818989
    Linux (x86-64)     U819234
    Linux (zSeries)    U819231
    Linux (Power)      U819029
    Linux (s390x)      U819233
    
                       v7.0
    Platform           Fix Pack 7.0.0.2
    --------           --------------------
    Windows            U200302
    AIX                U822354
    HP-UX (PA-RISC)    U822349
    HP-UX (Itanium)    U822351
    Solaris (SPARC)    U822353
    Solaris (x86-64)   U822394
    iSeries            tbc_p700_0_0_2
    Linux (x86)        U822348
    Linux (x86-64)     U822393
    Linux (zSeries)    U822352
    Linux (Power)      U822350
    
    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

    IZ33632

  • Reported component name

    WMQ LIN X86 V6

  • Reported component ID

    5724H7204

  • Reported release

    601

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2008-09-30

  • Closed date

    2008-10-20

  • Last modified date

    2009-03-10

  • 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

  • R600 PSY

       UP

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Document Information

Modified date:
10 March 2009