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IC82482: WEBSPHERE MQ V7.1: CLIENT CONNECTIONS DROP BECAUSE CHANNEL POOLING PROCESS TERMINATES UNEXPECTEDLY.

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APAR status

  • Closed as program error.

Error description

  • When running with WebSphere MQ V7.1, an access violation occurs
    in the amqrmppa process, with the following in the FDC:
    
    Probe id: XC130031
    Component: xehExceptionHandler
    Major Errorcode: xecF_E_UNEXPECTED_SYSTEM_RC
    Comment1: Access Violation at address 47959068 when reading
    
    MQM Function Stack
    zstAsyncConsumeThread
    xcsFFST
    

Local fix

  • Local Fix￘
    None
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users of WebSphere MQ V7.1 with client connections where
    SHARECNV on the channel is set to 1 or more.
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    When a client connection ended memory was being accessed after
    it had been freed. This caused an access violation, causing the
    amqrmppa process to terminate unexpectedly, dropping
    connections. This only occurred when SHARECNV on the channel was
    set to 1 or more.
    

Problem conclusion

  • The code was reordered to ensure that the memory for the
    connection was not being accessed after it had been freed.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.1       7.1.0.2
    v7.5       7.5.0.2
    
    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

    IC82482

  • Reported component name

    WMQ WINDOWS V7

  • Reported component ID

    5724H7220

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-04-03

  • Closed date

    2012-05-08

  • Last modified date

    2013-10-25

  • 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 WINDOWS V7

  • Fixed component ID

    5724H7220

Applicable component levels

  • R710 PSY

       UP

[{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SSFKSJ","label":"WebSphere MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.1"}]

Document Information

Modified date:
19 September 2021