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IZ02442: CHILD BROKER FAILS TO REJOIN BROKER TOPOLOGY AND CRASHES AFTER INCORRECT USE OF CLRMQBRK

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APAR status

  • Closed as program error.

Error description

  • Typically probes PU524040 on child broker and PU533010 from
    parent broker will be generated.
    

Local fix

  • After breaking parent relationship child Broker restart don't
    fails.
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users not following standard procedure when running the
    clrmqbrk command to remove references to a related broker.
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    The clrmqbrk command is used to clear the brokers memory of a
    neighbouring related broker (parent or child). We need to
    clear the memory of the broker at each end of the relationship.
    This means that the clrmqbrk command or an equivalent should be
    issued to both the parent and the child broker.
    
    Executing clrmqbrk command at only one end, that is either at
    parent or child, might leave the broker topology in an
    inconsistent state. When the clrmqbrk command is executed only
    at the child end, the child broker fails to rejoin the broker
    topology and crashes.
    

Problem conclusion

  • The problem is due to the incorrect state of the relationship
    between the child and parent after executing clrmqbrk only
    at the child end. When the child broker is trying to rejoin the
    broker topology the parent returns TOPOLOGY error and sends an
    exception report to the child broker. The child broker fails to
    process this exception report and crashes. Appropriate code
    changes has been done to process the exception report correctly.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v6.0
    Platform           Fix Pack 6.0.2.3
    --------           --------------------
    Windows            U200279
    AIX                U811346
    HP-UX (PA-RISC)    U811630
    HP-UX (Itanium)    U811631
    Solaris (SPARC)    U811632
    Solaris (x86-64)   U811633
    iSeries            SI27288
    Linux (x86)        U811634
    Linux (x86-64)     U811635
    Linux (zSeries)    U811636
    Linux (Power)      U811637
    Linux (s390x)      U811638
    
    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

    IZ02442

  • Reported component name

    WMQ LIN X86 V6

  • Reported component ID

    5724H7204

  • Reported release

    600

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2007-08-02

  • Closed date

    2007-09-25

  • Last modified date

    2009-01-21

  • 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:
21 January 2009