IBM Support

IT24066: IBM MQ leaks memory in amqrmppa when returning message property data on MQGET calls.

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APAR status

  • Closed as program error.

Error description

  • On a system where applications are using message handles,
    operating system
    commands to measure memory use show that amqrmppa processes
    consume large amounts of memory.  This memory use increases over
    a period of
    time.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users of IBM MQ v7.5 who use message handles may be affected by
    this problem.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    When getting a message using message handles some memory was
    allocated by the IBM MQ queue manager's channel pool process,
    which was not freed.  If this problem was not corrected then the
    system may have eventually run out of available memory.
    

Problem conclusion

  • The IBM MQ queue manager channel pool process code has been
    corrected so that memory that was previously leaked is now
    freed.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.5       7.5.0.9
    
    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

    IT24066

  • Reported component name

    WMQ BASE MULTIP

  • Reported component ID

    5724H7241

  • Reported release

    750

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-02-14

  • Closed date

    2018-02-26

  • Last modified date

    2018-03-23

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    PI94304

Fix information

  • Fixed component name

    WMQ BASE MULTIP

  • Fixed component ID

    5724H7241

Applicable component levels



Document information

More support for: WebSphere MQ
APAR / Maintenance

Software version: 7.5

Reference #: IT24066

Modified date: 23 March 2018


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