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IC67225: AUTO RECONNECT IN WRONG STATE DURING SYNCHRONOUS GET OPERATION FORCING RECEIVE CALL INTO INFINITE LOOP INTERNALLY

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APAR status

  • Closed as program error.

Error description

  • After applying the fix for IC65324, the WebSphere MQ (WMQ) JMS
    client hangs while reconnecting to another queue manager in the
    connection name list. The issue occurs while doing a synchronous
    get operation using the MessageConsumer.receive() API.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    This issue affects users of auto-reconnect feature of the
    WebSphere MQ v7.0.1 classes for Java Message Service (JMS).
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows) +Java
    ****************************************************************
    PROBLEM SUMMARY:
    When the WMQ queue manager is ended normally and
    the reconnect option is used, it sends a notification to the
    connected WMQ JMS clients to attempt a reconnect. The queue
    manager first enters into a quiescing state and then ends. The
    WMQ JMS client first sets the quiescing state flag and then
    attempts a reconnect. After the reconnect is successful this
    flag was not unset. This led to the infinite loop and a
    perception of a hang.
    

Problem conclusion

  • The fix ensures that the appropriate state is set so that the
    WMQ JMS client reconnects and starts to send and receive
    messages. This requires the changes made in IC65324 as a
    pre-requisite.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v7.0
    Platform           Fix Pack 7.0.1.3
    --------           --------------------
    Windows            U200320
    AIX                U834987
    HP-UX (PA-RISC)    U834414
    HP-UX (Itanium)    U834413
    Solaris (SPARC)    U834986
    Solaris (x86-64)   U834210
    iSeries            tbc_p700_0_1_3
    Linux (x86)        U834415
    Linux (x86-64)     U834985
    Linux (zSeries)    U834412
    Linux (Power)      U835662
    
    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

    IC67225

  • Reported component name

    WMQ WINDOWS V7

  • Reported component ID

    5724H7220

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-03-15

  • Closed date

    2010-05-26

  • Last modified date

    2011-08-17

  • 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

  • R700 PSY

       UP

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Document Information

Modified date:
17 August 2011