IBM Support

IC80980: WMQ V7 QUEUE MANAGER HANGS AFTER MULTIPLE LARGE FDC FILES ARE CREATED WITH PROBE ID XC457000.

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APAR status

  • Closed as program error.

Error description

  • Using WebSphere MQ V7 on Windows, a queue manager hangs after
    multiple large FDC files are generated in a loop for different
    processes with the following information:
    Probe Id          :- XC457000
    Component         :- xcsRefreshMTime
    Major Errorcode   :- xecU_E_TIME_ERROR
    The stack trace shows:
    xcsQueryMTimeFn
    xcsRefreshMTime
    xcsFFST
    
    The only way to recover from this situation is to restart the
    Windows system, neither a stop of the queue manager nor a stop
    of the WebSphere MQ service resolved the problem.
    
    The use of the environment variable AMQ_USE_SYSTEM_TIME did
    not help prevent the hang from reoccurring.
    

Local fix

  • LOCAL FIX:
    none
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Anyone using a time server to synchronize the time of their
    queue manager system.
    
    Platforms affected:
    Windows
    
    ****************************************************************
    PROBLEM SUMMARY:
    The problem was caused by a logic error in the MQ routines
    responsible for ensuring the accuracy of the current time to
    microsecond granularity. A change to the system time of a
    machine caused MQ to be unable to calculate the time to
    microsecond granularity, but it then began to infinitely loop in
    this state, producing many large FDC files.
    

Problem conclusion

  • The MQ routines responsible for ensuring the accuracy of the
    current time to microsecond granularity have been altered not to
    loop when microsecond time cannot be calculated. A single FDC
    file will still be generated.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v7.0
    Platform           Fix Pack 7.0.1.9
    --------           --------------------
    Windows            U200337
    
                       v7.1
    Platform           Fix Pack 7.1.0.2
    --------           --------------------
    Windows            7.1.0.2
    
    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

    IC80980

  • Reported component name

    WMQ WINDOWS V7

  • Reported component ID

    5724H7220

  • Reported release

    701

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-01-25

  • Closed date

    2012-02-28

  • Last modified date

    2012-02-28

  • 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

  • R701 PSY

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Document Information

Modified date:
28 February 2012