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PM51310: IN SERVICE INTEGRATION BUS, PUBLISH/SUBSCRIBE MESSAGES REMAIN IN"PENDING ACKNOWLEDGMENT MODE" STATE ON REMOTE PUBLICATION POINTS

Fixes are available

7.0.0.23: WebSphere Application Server V7.0 Fix Pack 23
8.0.0.4: WebSphere Application Server V8.0 Fix Pack 4
7.0.0.25: WebSphere Application Server V7.0 Fix Pack 25
8.0.0.5: WebSphere Application Server V8.0 Fix Pack 5
7.0.0.27: WebSphere Application Server V7.0 Fix Pack 27
8.0.0.6: WebSphere Application Server V8.0 Fix Pack 6
7.0.0.29: WebSphere Application Server V7.0 Fix Pack 29
8.0.0.7: WebSphere Application Server V8.0 Fix Pack 7
8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
7.0.0.31: WebSphere Application Server V7.0 Fix Pack 31
7.0.0.27: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.33: WebSphere Application Server V7.0 Fix Pack 33
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
7.0.0.35: WebSphere Application Server V7.0 Fix Pack 35
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
7.0.0.37: WebSphere Application Server V7.0 Fix Pack 37
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
7.0.0.39: WebSphere Application Server V7.0 Fix Pack 39
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
7.0.0.23: Java SDK 1.6 SR10 FP1 Cumulative Fix for WebSphere
7.0.0.25: Java SDK 1.6 SR11 Cumulative Fix for WebSphere Application Server
7.0.0.27: Java SDK 1.6 SR12 Cumulative Fix for WebSphere Application Server
7.0.0.29: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.45: Java SDK 1.6 SR16 FP60 Cumulative Fix for WebSphere Application Server
7.0.0.31: Java SDK 1.6 SR15 Cumulative Fix for WebSphere Application Server
7.0.0.35: Java SDK 1.6 SR16 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.37: Java SDK 1.6 SR16 FP3 Cumulative Fix for WebSphere Application Server
7.0.0.39: Java SDK 1.6 SR16 FP7 Cumulative Fix for WebSphere Application Server
7.0.0.41: Java SDK 1.6 SR16 FP20 Cumulative Fix for WebSphere Application Server
7.0.0.43: Java SDK 1.6 SR16 FP41 Cumulative Fix for WebSphere Application Server

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APAR status

  • Closed as program error.

Error description

  • In Service Integration Bus, publish/subscribe messages remains
    in "Pending Acknowledgment mode" state on remote publication
    points even if there is no connection problem between messaging
    engines. The topic space where messages remain in the said state
    eventually gets full and no subsequent messages can be
    processed.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Users of the default messaging provider for *
    *                  IBM WebSphere Application Server            *
    ****************************************************************
    * PROBLEM DESCRIPTION: In a pubsub environment in the absence  *
    *                      of local consumer if the messages do    *
    *                      not get processed in order then once    *
    *                      the messages with lower ticks get       *
    *                      processed by the consumer of the remote *
    *                      Messaging Engine and acknowledged the   *
    *                      higher ones were remaining un           *
    *                      acknowledged since they were            *
    *                      already acknowledged but weren't        *
    *                      updated since the code was waiting for  *
    *                      the lower ticks to be updated . This    *
    *                      causes the completed prefix to remain   *
    *                      without getting incremented and results *
    *                      in causing the message pile up.         *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    In Service Integration Bus, publish/subscribe messages remains
    in "Pending Acknowledgment mode" state on remote publication
    points even if there is no connection problem between messaging
    engines. The topic space where messages remain in the said
    state
    eventually gets full and no subsequent messages can be
    processed.
    

Problem conclusion

  • Code has been modified to check the completion status of
    message
    processing and keep moving the completed Prefix.
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 7.0.0.23 and 8.0.0.4. Please refer to the Recommended
    Updates page for delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM51310

  • Reported component name

    WAS SIB & SIBWS

  • Reported component ID

    620800101

  • Reported release

    300

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-11-01

  • Closed date

    2012-02-03

  • Last modified date

    2012-02-07

  • 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

    WAS SIB & SIBWS

  • Fixed component ID

    620800101

Applicable component levels

  • R300 PSY

       UP

  • R800 PSY

       UP



Document information

More support for: WebSphere Application Server
Service Integration Technology

Software version: 7.0

Reference #: PM51310

Modified date: 07 February 2012