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IV22255: WEBSPHERE MQ V7 CREATES PROXY SUBSCRIPTIONS WITH A LEADING '/' IN THE TOPIC STRING.

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APAR status

  • Closed as program error.

Error description

  • The SYSTEM.BASE.TOPIC topic object is altered to set
    PROXYSUB(FORCE) and to add the topic to a cluster. This causes
    proxy subscriptions to be created on the other queue managers
    in the cluster. Initially the proxy subscriptions are created
    with the correct topic string of '#', but if a queue manager
    with one of the proxy subscriptions is restarted, the topic
    string changes to '/#', for example:
    
    AMQ8096: WebSphere MQ subscription inquired.
    SUBID(414D5120434C555331202020202020200B8AE04F20000C02)
    SUB(SYSTEM.PROXY.CLUS1 CLUSTER /#)      TOPICSTR(/#)
    TOPICOBJ( )
    DEST(SYSTEM.INTER.QMGR.PUBS)
    
    This causes messages not to be published round the cluster as
    expected, because messages published without a leading '/'
    character at the start of the topic string being published to
    don't match the proxy subscription.
    

Local fix

  • To get the correct proxy subscriptions recreated after a queue
    manager restart:
    
    1. On each queue manager in the cluster alter the
    SYSTEM.BASE.TOPIC to not be in the cluster (set CLUSTER to '').
    
    2. On each queue manager in the cluster delete all the proxy
    subscriptions for '/#'.
    
    3. On each queue manager in the cluster alter the
    SYSTEM.BASE.TOPIC to be back in the cluster.
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users of clustered publish/subscribe, where SYSTEM.BASE.TOPIC
    is being clustered.
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    The code generating the topic string for the proxy subscription
    when the queue manager was restarting was incorrectly adding a
    '/' character for SYSTEM.BASE.TOPIC.
    

Problem conclusion

  • The code generating the topic string for the proxy subscription
    when the queue manager is restarting now correctly does not add
    a '/' character when the topic involved is the
    SYSTEM.BASE.TOPIC.
    
    ---------------------------------------------------------------
    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
    
    Platform           v7.5
    --------           --------------------
    Multiplatforms     7.5.0.1
    
    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

    IV22255

  • 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

    2012-06-07

  • Closed date

    2012-08-15

  • Last modified date

    2012-08-15

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

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

    PM70900

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:
15 August 2012