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IV19854: PARTIAL REPOSITORIES SUBSCRIBE AUTOMATICALLY TO CLUSTER QUEUE MANAGERS THAT ARE PUBLISHED TO THEM.

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The repository manager in a partial respository unnecessarily
    subscribes to each cluster queue manager that it is aware of.
    
    When using clustered pubslish/subscribe, this causes a
    significant increase in the number of subscriptions that are
    made, and in large clusters this can cause performance problems.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All clusters are affected although normally the problem is
    fairly benign just causing a little extra unnecessary
    processing. However, in large Pub/Sub Clusters the extra
    processing can be significant and cause performance problems.
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    The problem is caused by the repository manager unnecessarily
    subscribing to each cluster queue manager it knows about. In a
    cluster without Pub/Sub this does not cause too much extra
    processing but with cluster topics there is a very significant
    increase in the number of subscriptions made and in large
    clusters can cause a performance problem.
    

Problem conclusion

  • The extra subscriptions have been removed.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v7.0
    Platform           Fix Pack 7.0.1.10
    --------           --------------------
    Windows            U200352
    AIX                U853055
    HP-UX (PA-RISC)    U853082
    HP-UX (Itanium)    U853087
    Solaris (SPARC)    U853083
    Solaris (x86-64)   U853089
    iSeries            7.0.1.10
    Linux (x86)        U853084
    Linux (x86-64)     U853088
    Linux (zSeries)    U853085
    Linux (Power)      U853086
    
                       v7.1
    Platform           Fix Pack 7.1.0.3
    --------           --------------------
    Windows            7.1.0.3
    AIX                7.1.0.3
    HP-UX (Itanium)    7.1.0.3
    Solaris (SPARC)    7.1.0.3
    Solaris (x86-64)   7.1.0.3
    iSeries            7.1.0.3
    Linux (x86)        7.1.0.3
    Linux (x86-64)     7.1.0.3
    Linux (zSeries)    7.1.0.3
    Linux (Power)      7.1.0.3
    
    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

    IV19854

  • Reported component name

    WMQ AIX V7

  • Reported component ID

    5724H7221

  • Reported release

    701

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-04-18

  • Closed date

    2012-07-17

  • Last modified date

    2013-05-13

  • APAR is sysrouted FROM one or more of the following:

    PM57663

  • 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

  • R701 PSY

       UP

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Document Information

Modified date:
13 May 2013