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IV22989: WEBSPHERE MQ V7.1 CLASSES FOR JAVA APPLICATION REPORTS MQJE001 COMPLETION CODE 2 REASON 2018 WHEN SENDING MESSAGES

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APAR status

  • Closed as program error.

Error description

  • A WebSphere MQ V7.1 classes for Java application is running,
    and the following message is logged:
    
    MQJE001: Completion Code '2', Reason  '2018'
    
    when sending messages to a WebSphere MQ queue.  The messages do
    make it to the destination queue.  There are no FDCs or queue
    manager errors reported.
    
    Trace details report the following exception as having been
    thrown:
    
    Throwing Exception: com.ibm.mq.MQException: MQJE001: Completion
    Code '2', Reason '2018'.
    com.ibm.mq.MQManagedObject.close(MQManagedObject.java:408)
    com.ibm.mq.MQManagedObject.finalize(MQManagedObject.java:442)
    com.ibm.mq.MQQueueManager.finalize(MQQueueManager.java:4416)
    java.lang.J9VMInternals.runFinalize(J9VMInternals.java:408)
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users connecting to WebSphere MQ V7 queue manager from WebSphere
    MQ Classes for Java, where the application connects and
    disconnects from the queue manager more than once.
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows) +Java +Java zOS
    ****************************************************************
    PROBLEM SUMMARY:
    The WebSphere MQ classes for Java keeps an internal list of
    connections which have been made to the queue manager.  When
    the connections were no longer needed, the entries in this list
    may have been cleared without fully closing the associated
    connection to the queue manager.
    
    At a later time, the JVM garbage collection thread later found
    these unreferenced connection objects, and runs the associated
    finalize method, the 'hconn' may have been disconnected, which
    results in a MQRC 2018 message being output (MQRC_HCONN_ERROR).
    

Problem conclusion

  • The code fix associated with this APAR ensures that the internal
    queue managers connection list is not cleared until it has been
    completely closed.
    
    The result of this is that there are no unusable queue manager
    connection objects left in the memory, and so the problem does
    not occur when the JVM garbage collector thread runs.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v7.1
    Platform           Fix Pack 7.1.0.2
    --------           --------------------
    Windows            U200351
    AIX                U853019
    HP-UX (Itanium)    U853052
    Solaris (SPARC)    U853048
    Solaris (x86-64)   U853054
    iSeries            7.1.0.2
    Linux (x86)        U853049
    Linux (x86-64)     U853053
    Linux (zSeries)    U853050
    Linux (Power)      U853051
    zOS                7.1.0.2
    
    Platform           v7.5
    --------           --------------------
    Multiplatforms     7.5.0.1
    
    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

    IV22989

  • Reported component name

    WMQ AIX V7

  • Reported component ID

    5724H7221

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-06-13

  • Closed date

    2012-07-31

  • Last modified date

    2012-10-24

  • 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 AIX V7

  • Fixed component ID

    5724H7221

Applicable component levels

  • R710 PSY

       UP

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Document Information

Modified date:
24 October 2012