IBM Support

IC98975: WMQ V7.1 .NET APPLICATION HANGS AFTER STOPPING THE CHANNEL OR QUIESCING THE QUEUE MANAGER.

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APAR status

  • Closed as program error.

Error description

  • WebSphere MQ (WMQ) v7.1 client running a .NET applications hangs
    when the queue manager is quiesced or the channel is stopped.
    All subsequent .NET transactions are blocked.
    No FDCs are generated.
    
    output of dspmqtrn for the queue manager shows many transactions
    in a PREPARE state.
    
    dspmqtrn -a -m QMGR1 | grep PREPARED
    TRANSTATE(PREPARED)
    TRANSTATE(PREPARED)
    TRANSTATE(PREPARED)
    
    
    Additional Symptom(s) Search Keyword(s):
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of WebSphere MQ .Net Client in managed mode
    
    
    Platforms affected:
    Windows
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    When the client/server connection channel in use by applications
    connected using the .Net managed client, is stopped or the queue
    manager shut down the connections are not terminated cleanly,
    and can cause the application to hang.
    

Problem conclusion

  • MQ .Net client code was reworked to improve locking strategy and
    recognise and handle changes in connection status correctly.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.1       7.1.0.6
    v7.5       7.5.0.5
    
    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

    IC98975

  • 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

    2014-01-24

  • Closed date

    2014-07-21

  • Last modified date

    2014-07-21

  • 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

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Document Information

Modified date:
09 March 2021