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IV52053: WEBSPHERE MQ V7 AMQZLAA0 PROCESS SHOWS MEMORY USAGE INCREASING OVER TIME.

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APAR status

  • Closed as program error.

Error description

  • While monitoring the operating system with tools such as ps
    -elf the memory usage for the amqzlaa0 process is growing to a
    point were all the memory was consumed.
    

Local fix

  • Restart the queue manager.
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    You may be impacted by this problem if you are using MQ
    asynchronous consume and messages with message properties
    are being got, and those properties have been requested to be
    stripped out of the message, but the resultant
    required buffer is larger than 8k.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM SUMMARY:
    If the message data is too big to fit in the standard 8k
    buffer with the message properties in, but the
    application has asked for them to be stripped out, and that will
    fit, then MQ temporarily allocates a bigger buffer.
    However, MQ fails to free the temporary buffer.
    

Problem conclusion

  • The fix is to ensure that a temporary buffer, if it has been
    allocated, is ultimately freed.
    
    ---------------------------------------------------------------
    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       7.5.0.4
    
    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

    IV52053

  • 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

    2013-11-13

  • Closed date

    2013-11-28

  • Last modified date

    2013-11-28

  • 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

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Document Information

Modified date:
28 November 2013