IBM Support

IT14672: SDR CHANNEL FAILS TO START AFTER HA FAILOVER DUE TO DUPLICATE XA TRANSACTION ID

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APAR status

  • Closed as program error.

Error description

  • A channel process (runmqchl) does not start and reports AMQ9588
    (return code 2042) / AMQ9592 (return code 28759) error messages
    reported in the error logs after a queue manager fail over from
    one MQ Appliance to the other in an HA group.
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users with HA queue managers with an external transaction
    coordinator which rolls back a transaction due to a fail over.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    A coding error meant that under load it was possible for the
    queue manager to allocate a transaction ID to a new XA commit
    operation when the ID was already associated with an in-doubt
    channel transaction.
    

Problem conclusion

  • The queue manager logic has been updated to ensure that the
    allocated IDs are correctly incremented in order to prevent this
    duplicate allocation of transaction IDs
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v8.0       8.0.0.6
    v9.0 CD    9.0.1
    v9.0 LTS   9.0.0.1
    
    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

    IT14672

  • Reported component name

    IBM MQ APPL M20

  • Reported component ID

    5725S1400

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-04-06

  • Closed date

    2016-07-27

  • Last modified date

    2016-07-28

  • 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

    IBM MQ APPL M20

  • Fixed component ID

    5725S1400

Applicable component levels

  • R800 PSY

       UP

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Document Information

Modified date:
28 July 2016