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IV28699: WEBSPHERE MQ MESSAGES DELIVERED OUT OF SEQUENCE

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APAR status

  • Closed as program error.

Error description

  • A batch of messages is sent from an application to a queue
    manager. Trace shows the messages arrive in the correct
    order. However, when the messages are delivered, they are
    out of sequence.
    
    Example:
    Message ID ending in 20111d74 arrives.
    Followed by message ID ending in 20111d76.
    When delivered, 20111d76 is delivered first.
    Followed by the delivery of 20111d74.
    .
    This does not comply with the MQ 7.1 InfoCenter:
    Configuring
    Connecting applications using distributed queuing
    WebSphere MQ distributed-messaging techniques
    Channel message sequence numbering
    Sequential retrieval of messages
    .
    This can be recreated by having more than one application
    (browse and destructive get applications) waiting to get
    message from the queue.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users running applications to get and browse messages at the
    same time
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    The problem occurred because the queue manager did not wake up
    the destructive waiter because of a missing condition in the
    waiter wakeup logic.
    

Problem conclusion

  • WebSphere MQ waiter wakeup logic code has been modified to add
    the missing condition.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV28699

  • 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

    2012-09-26

  • Closed date

    2012-10-25

  • Last modified date

    2012-10-25

  • 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 AIX V7

  • Fixed component ID

    5724H7221

Applicable component levels

  • R710 PSY

       UP

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Document Information

Modified date:
25 October 2012