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IT18374: IBM MQ MEMORY LEAK IF ACTIVITY TRACE IS CONFIGURED AND APPLICATION ENDS WITHOUT CALLING MQDISC.

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APAR status

  • Closed as program error.

Error description

  • Memory usage of the IBM MQ amqzlaa0 process may be seen to rise
    over time in an uncontrolled manner.  If corrective action is
    not taken
    then free memory on the system may become exhausted.
    

Local fix

  • Applications should disconnect cleanly using MQDISC
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users of activity trace that have applications which do not
    cleanly disconnect may be affected by this problem
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    Some memory was allocated by the activity trace functionality
    while an application was connected to the queue manager.  This
    application ended without disconnecting from the queue manager
    and the memory allocated by the activity trace functionality was
    leaked.
    

Problem conclusion

  • The code is corrected so that all memory that is allocated by
    the activity trace functionality is freed when cleanup
    processing takes place for applications that end without
    disconnecting from the queue manager.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.5       7.5.0.8
    v8.0       8.0.0.7
    v9.0 CD    9.0.3
    v9.0 LTS   9.0.0.2
    
    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

    IT18374

  • Reported component name

    WMQ BASE MULTIP

  • Reported component ID

    5724H7241

  • Reported release

    750

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-12-20

  • Closed date

    2017-02-28

  • Last modified date

    2017-02-28

  • 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

    5724H7241

Applicable component levels

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSCPQ63","label":"APAR \/ Maintenance"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.5","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
28 February 2017