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PM81521: MESSAGES STUCK IN PENDING ACKNOWLEDGEMENT STATE IN WEBSPHERE APPLICATION SERVER SERVICE INTEGRATIONS BUS DESTINATION

Fixes are available

PM81521; 7.0.0.25, 7.0.0.27, 7.0.0.29: Messages stuck in pending acknowledgement state in Websphere Application Server
PM81521;8.0.0.6: messages stuck in pending acknowledgement state in websphere appl
8.5.5.1: WebSphere Application Server V8.5.5 Fix Pack 1
8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
7.0.0.31: WebSphere Application Server V7.0 Fix Pack 31
8.5.5.2: WebSphere Application Server V8.5.5 Fix Pack 2
7.0.0.33: WebSphere Application Server V7.0 Fix Pack 33
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
8.5.5.3: WebSphere Application Server V8.5.5 Fix Pack 3
7.0.0.35: WebSphere Application Server V7.0 Fix Pack 35
8.5.5.4: WebSphere Application Server V8.5.5 Fix Pack 4
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
7.0.0.37: WebSphere Application Server V7.0 Fix Pack 37
8.5.5.5: WebSphere Application Server V8.5.5 Fix Pack 5
8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
7.0.0.39: WebSphere Application Server V7.0 Fix Pack 39
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
7.0.0.45: 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
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • In WebSphere Application Server v7.0.x Service Integration
    Bus, multiple messaging engines are configured to use a
    Publish Subscribe topology. When more than one messaging
    engine is shut down and started up in parallel and messages
    are published at the same time, the messages remain in
    pending acknowledgement state.
    

Local fix

  • Restart the messaging engines sequentially.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Users of the default messaging provider     *
    *                  for                                         *
    *                  IBM WebSphere Application Server v7.0,      *
    *                  v8.0, and v8.5.5                            *
    ****************************************************************
    * PROBLEM DESCRIPTION: Message pile up is observed on the      *
    *                      Source Messaging Engine awaiting for    *
    *                      the messages to be acknowledged from    *
    *                      the Target Messaging Engine.            *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When using Publish Subscribe in Service Integration Bus in a
    multi Messaging Engine scenario, message pile up is observed on
    the Source Messaging Engine awaiting for the messages to be
    acknowledged from the Target Messaging Engine. There are
    various reasons why the target messaging engine is not
    acknowledging the messages.Some of the scenarios are gaps
    created due to a very minute timing window between message
    production and target messaging engine start-up (or) messages
    being received out of order and having a lot of silences in
    between (or) lack of consolidation between the streams leading
    to virtual gaps.
    

Problem conclusion

  • Code has been modified to effectively synchronize the timing
    window between message production and target messaging engine
    start-up registration and also to consolidate effectively to
    overcome the problems due to out of order delivery and silence
    messages and to fill the virtual gaps.
    
    The fix for this APAR is currently targeted for inclusion in
    fix packs 7.0.0.31,8.0.0.8 and 8.5.5.1 . Please note that This
    APAR supercedes PM62615,PM71430. If applying an interim fix
    for PM81521, the install sequence should be PM56596
    followed by PM81521. You need not install interim fixes for
    PM62615 and PM71430 .
    
    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

    PM81521

  • 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

    2013-01-28

  • Closed date

    2013-06-24

  • Last modified date

    2013-10-04

  • 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

  • R850 PSY

       UP



Document information

More support for: WebSphere Application Server
Service Integration Technology

Software version: 7.0

Reference #: PM81521

Modified date: 04 October 2013