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IT17392: WINDOWS .NET CLIENT LEAKS MEMORY WHEN USING CCDT WITH QUEUE MANAGER GROUPS TO CONNECT TO A QUEUE MANAGER.

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APAR status

  • Closed as program error.

Error description

  • The memory leak is seen only when queue manager groups in the
    Client Channel Definition Table (CCDT) file are used in a .NET
    application. The leak is not seen when
    the connection is established to a single queue manager using
    a CCDT. The leak is majorly seen in MQChannelEntry and
    MQChannelDefinition.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    This issue affects users who have defined queue manager groups
    in a CCDT file, and are using the CCDT file with a .NET
    application in managed mode
    
    
    Platforms affected:
    Windows
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    The MQ .NET code allocated a data structure for all the channels
    in the group for every connection, however an omission in the
    disconnection logic failed to clean up these structures.
    

Problem conclusion

  • The MQ .NET code has been modified to clear up the data
    structures for the CCDT entries on disconnection.
    
    ---------------------------------------------------------------
    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

    IT17392

  • 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

    2016-10-06

  • Closed date

    2017-04-11

  • Last modified date

    2017-04-11

  • 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:
11 April 2017