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IV49602: Memory exception and possible loss of function in WebSphere MQ application

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • A WebSphere MQ application or a SVRCONN channel thread in an
    amqrmppa process might suffer a memory exception (example:
    SIGSEGV).
    
    FDC records might be written with probe XC130003 or XC130031.
    
    The MQM Function Stack might contain:
    
    zstAsyncConsumeThread
    zstAsyncConsume
    vpiConvertData
    vwaConvert
    vwb_rf_header_2
    xcsFFST
    

Local fix

  • Set SHARECNV(0) on the SVRCONN channel definition.
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users of the WebSphere MQ asynchronous consume function, where
    consumer functions have been registered with the MQGMO_CONVERT
    option, and in which MQRFH2 data blocks are in use by the
    applications.
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    The queue manager was returning an incorrect data length to the
    WebSphere MQ code running in the application process.  This
    code then used this length to try to read more bytes than were
    actually readable.  This then caused the memory exception to
    occur.
    

Problem conclusion

  • The WebSphere MQ product code has been corrected to ensure the
    length passed back by the queue manager to the application is
    correct.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.0       7.0.1.12
    v7.1       7.1.0.5
    v7.5       7.5.0.3
    
    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

    IV49602

  • Reported component name

    WMQ AIX V7

  • Reported component ID

    5724H7221

  • Reported release

    701

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-09-19

  • Closed date

    2013-10-18

  • Last modified date

    2013-10-18

  • 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 AIX V7

  • Fixed component ID

    5724H7221

Applicable component levels

  • R701 PSY

       UP

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Document Information

Modified date:
18 October 2013