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IT21087: Cluster channel fails to start after queue manager restart with messages on the cluster transmit queue

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • When a cluster Queue Manager is restarted with pending messages
    on the cluster transmit queue, cluster sender channels which
    should restart (those not explicitly placed in STOPPED state)
    may fail to start.
    

Local fix

  • Issue the 'start channel' command using runmqsc or MQExplorer to
    restart channels that were not in STOPPED state when the queue
    manager previously ended.
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    This issue affects users of MQ clustering
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    Memory used by a data structure related to the cluster transmit
    queue that occurs on queue manager startup was not initialized
    prior to use, which resulted the channel not starting.
    

Problem conclusion

  • The MQ queue manager logic has been corrected to initialize the
    affected data structure prior to use
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v8.0       8.0.0.13
    v9.0 LTS   9.0.0.2
    
    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

    IT21087

  • Reported component name

    IBM MQ BASE M/P

  • Reported component ID

    5724H7261

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-06-20

  • Closed date

    2017-07-24

  • Last modified date

    2019-10-17

  • 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

    IBM MQ BASE M/P

  • Fixed component ID

    5724H7261

Applicable component levels

  • R900 PSY

       UP

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Document Information

Modified date:
26 August 2021