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IT08461: IBM MQ 8.0 ON UNIX PROCESS CONSUMES LARGE AMOUNTS OF MEMORY UNRELATED TO WORKLOAD

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APAR status

  • Closed as program error.

Error description

  • IBM MQ 8.0 processes consume large amount of memory in
    comparison to lower levels of MQ
    with same workload. Consumption is likely to be seen in amqzlaa0
    and/or amqrmppa and
    applications if amqrmppa and the application connect to queue
    manager in fastpath mode.
    The leak occurs in the function zfuGroupCheckOS which verifies
    whether a given group exists or not.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Any users with MQ activity that requires a check on whether an
    OS group exists or not will be affected by this problem.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    This problem occurred because the memory allocated when querying
    the OS groups was not freed.
    

Problem conclusion

  • MQ has been modified to free the allocated memory when querying
    the OS groups.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v8.0       8.0.0.3
    
    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

    IT08461

  • Reported component name

    WMQ BASE MULTIP

  • Reported component ID

    5724H7251

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-04-22

  • Closed date

    2015-04-28

  • Last modified date

    2015-04-28

  • 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 BASE MULTIP

  • Fixed component ID

    5724H7251

Applicable component levels

  • R800 PSY

       UP

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Document Information

Modified date:
28 April 2015