IBM Support

IT16014: MQ Explorer memory growth when browsing queue

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APAR status

  • Closed as program error.

Error description

  • Browsing messages on queues with IBM MQ Explorer increases
    commit size memory each time the queue is browsed. This memory
    is not released and continues to grow each time a queue is
    browsed or refreshed.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of IBM MQ Explorer making use of the browse queue
    functionality.
    
    
    Platforms affected:
    Linux on Power, Linux on S390, Linux on x86, Linux on x86-64,
    Linux on zSeries, Windows
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    When the browse dialog was closed the objects it contained were
    not made eligible for garbage collection due to a circular
    memory reference. Because the objects were never garbage
    collected by the JVM each invocation of the browse dialog would
    cause the memory usage of the IBM MQ Explorer to increase.
    

Problem conclusion

  • The circular reference has been removed, thereby making the
    objects which back the browse dialog eligible for garbage
    collection. This causes the memory used to be reduced when the
    JVM runs the garbage collector.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.5       7.5.0.8
    v8.0       8.0.0.6
    v9.0 CD    9.0.2
    v9.0 LTS   9.0.0.1
    
    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

    IT16014

  • Reported component name

    WEBSPHERE MQ 7.

  • Reported component ID

    5724H7240

  • Reported release

    750

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-07-20

  • Closed date

    2016-10-28

  • Last modified date

    2017-06-01

  • 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

    WEBSPHERE MQ 7.

  • Fixed component ID

    5724H7240

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:
01 June 2017