IBM Support

IC82908: WebSphere MQ V7.1: Queue manager ends unexpectedly. FFST probe XC130031 in kqiTickleEarly. zrcC_E_INVALID_HANDLE may be seen.

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APAR status

  • Closed as program error.

Error description

  • The queue manager ends unexpectedly producing an FDC file with
    the following entries (extracts only):
    
    PIDS              :- 5724H7220
    LVLS              :- 7.1.0.0
    Product Long Name :- WebSphere MQ for Windows
    Probe Id          :- XC130031
    Application Name  :- MQM
    Component         :- xehExceptionHandler
    SCCS Info         :- lib/cs/pc/winnt/amqxerrn.c, 1.44
    Line Number       :- 761
    Build Date        :- Oct 19 2011
    CMVC level        :- p000-L111019
    Build Type        :- IKAP - (Production)
    Process Name      :- C:\Program Files (x86)\IBM\WebSphere
    MQ\bin\amqzlaa0.exe
    Major Errorcode   :- xecF_E_UNEXPECTED_SYSTEM_RC
    Minor Errorcode   :- OK
    Probe Type        :- MSGAMQ6119
    Probe Severity    :- 2
    Probe Description :- AMQ6109: An internal WebSphere MQ error has
    occurred.
    FDCSequenceNumber :- 0
    Comment1          :- Access Violation at address xxxxxxxx when
    writing
    
    ---> Stack dump for the faulting thread (xxxxx) <---
    ...
    As a result of a Severe Abend Error, a MiniDump has been written
    to: AMQxxxx.xxxx.0.dmp
    
    An Unhandled Exception detected in process xxxx, on thread
    xxxxx.
    Type: EXCEPTION_ACCESS_VIOLATION (C0000005).
    Address: xxxx:xxxxxxxx.
    The thread could not write to memory address xxxxxxxxxx.
    
    MQM Function Stack
    zlaMainThread
    zlaProcessMessage
    zlaProcessMQIRequest
    zlaMQPUT
    zsqMQPUT
    kpiMQPUT
    kqiPutIt
    kqiPutMsgSegments
    kqiTickleEarly
    xcsFFST
    
    After the above FDC entry occurs, the following entry appears:
    
    Probe Id          :- ZC004040
    Component         :- zcpCreateMessage
    Major Errorcode   :- zrcC_E_INVALID_HANDLE
    

Local fix

  • An interim fix is available from IBM Support and internal
    reference PRB item 5347
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Customers putting messages greater than 1MB in size where an
    asynchronous consumer will receive the message (including client
    applications getting messages from a channel where the SHARECNV
    attribute is greater than zero).
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    When the queue manager tries to deliver a message larger than
    1MB directly to an asynchronous consumer a shared memory
    overwrite occurs with the second large message causing an access
    violation in the amqzlaa0 process. Depending on the size of the
    message, the overwrite may cause subsequent failures in the
    queue manager causing it to end abruptly.
    

Problem conclusion

  • The queue manager was changed not to overwrite the shared memory
    regardless of the size of message being delivered directly to
    the asynchronous consumer.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v7.1
    Platform           Fix Pack 7.1.0.2
    --------           --------------------
    Windows            7.1.0.2
    AIX                7.1.0.2
    HP-UX (Itanium)    7.1.0.2
    Solaris (SPARC)    7.1.0.2
    Solaris (x86-64)   7.1.0.2
    iSeries            7.1.0.2
    Linux (x86)        7.1.0.2
    Linux (x86-64)     7.1.0.2
    Linux (zSeries)    7.1.0.2
    Linux (Power)      7.1.0.2
    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

    IC82908

  • Reported component name

    WMQ WINDOWS V7

  • Reported component ID

    5724H7220

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-04-26

  • Closed date

    2012-06-19

  • Last modified date

    2012-06-19

  • 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 WINDOWS V7

  • Fixed component ID

    5724H7220

Applicable component levels

  • R710 PSY

       UP

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Document Information

Modified date:
19 June 2012