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IT10965: WEBSPHERE MQ V8. MESSAGE SELECTOR DOES NOT WORK AS EXPECTED

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APAR status

  • Closed as program error.

Error description

  • A message selector is configured in MQ V7 that worked as
    expected. Since migrating to V8, all messages will be selected
    whether the given condition is true or not. The selector's
    criteria is not being honored and this results in unexpected
    messages to be delivered to the receiver.
    

Local fix

  • Modify the application to use a version 2 or higher MQMD header
    to store the groupID information
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users of MQ V8 who use a message selector on GroupID against a
    queue containing messages with a version 1 MQMD header.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    A logic error meant that GroupID information stored in an MQMDE
    header, following a version 1 MQMD header, was not correctly
    considered for selection when selecting by GroupID. GroupID
    information stored in a version 2 or higher was correctly
    considered for selection.
    
    In the particular scenario described above, the selector was
    used to select only messages with a null GroupID. Due to the
    logic error, messages with a valid group identifier in the MQMDE
    header were incorrectly returned to the application.
    

Problem conclusion

  • The MQ V8 code has been modified to correctly consider the
    groupID supplied in an MQMDE header when the MQMD version is 1.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v8.0       8.0.0.5
    
    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

    IT10965

  • Reported component name

    WMQ BASE MULTIP

  • Reported component ID

    5724H7251

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2015-09-02

  • Closed date

    2016-02-24

  • Last modified date

    2016-02-24

  • 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 BASE MULTIP

  • Fixed component ID

    5724H7251

Applicable component levels

  • R800 PSY

       UP

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Document Information

Modified date:
24 February 2016