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PM10591: FILESTORE NEVER RECOVERS FROM OBJECTSTOREFULLEXCEPTION (CWSOM1042E)

Fixes are available

PM10591; 6.1.0.29: filestore never recovers from ObjectStoreFullException
6.1.0.33: Java SDK 1.5 SR12 FP1 Cumulative Fix for WebSphere
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for AIX
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for HP-UX
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for IBM i
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for Linux
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for Solaris
7.0.0.13: WebSphere Application Server V7.0 Fix Pack 13 for Windows
7.0.0.13: Java SDK 1.6 SR8FP1 Cumulative Fix for WebSphere Application Server
6.1.0.35: Java SDK 1.5 SR12 FP2 Cumulative Fix for WebSphere
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for AIX
7.0.0.15: Java SDK 1.6 SR9 Cumulative Fix for WebSphere Application Server
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for HP-UX
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for IBM i
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Linux
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Solaris
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Windows
6.1.0.37: Java SDK 1.5 SR12 FP3 Cumulative Fix for WebSphere
7.0.0.17: WebSphere Application Server V7.0 Fix Pack 17
7.0.0.17: Java SDK 1.6 SR9 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.19: WebSphere Application Server V7.0 Fix Pack 19
7.0.0.21: WebSphere Application Server V7.0 Fix Pack 21
7.0.0.23: WebSphere Application Server V7.0 Fix Pack 23
7.0.0.25: WebSphere Application Server V7.0 Fix Pack 25
7.0.0.27: WebSphere Application Server V7.0 Fix Pack 27
7.0.0.29: WebSphere Application Server V7.0 Fix Pack 29
6.1.0.47: WebSphere Application Server V6.1 Fix Pack 47
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
7.0.0.35: WebSphere Application Server V7.0 Fix Pack 35
7.0.0.37: WebSphere Application Server V7.0 Fix Pack 37
7.0.0.39: WebSphere Application Server V7.0 Fix Pack 39
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
6.1.0.39: Java SDK 1.5 SR12 FP4 Cumulative Fix for WebSphere Application Server
6.1.0.41: Java SDK 1.5 SR12 FP5 Cumulative Fix for WebSphere Application Server
6.1.0.43: Java SDK 1.5 SR13 Cumulative Fix for WebSphere Application Server
6.1.0.45: Java SDK 1.5 SR14 Cumulative Fix for WebSphere Application Server
6.1.0.47: Java SDK 1.5 SR16 Cumulative Fix for WebSphere Application Server
7.0.0.19: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.21: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere
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

  • When using WebSphere Application Server Service Integration Bus
    with a filestore, if the store becomes full
    (ObjectStoreFullException CWSOM1042E), no more messages can
    ever be sent.  Even consuming every message on the messaging
    engine will not allow more messages to be sent because
    ObjectStoreFullException is still thrown despite the store
    being effectively empty.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Users of the default messaging provider     *
    *                  for IBM WebSphere Application Server        *
    *                  Version 6.1 and Version 7.0                 *
    ****************************************************************
    * PROBLEM DESCRIPTION: If the filestore becomes full           *
    *                      (CWSOM1042E), no more messages can      *
    *                      ever be sent even if all existing       *
    *                      messages are consumed.                  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The problem is caused by a programming error in an
    algorithm that determines if the store is full.  Once the
    store becomes full the programming error means that even if
    all messages are consumed (so the store is effectively empty)
    the algorithm still reports that the store is full.
    

Problem conclusion

  • This APAR fixes the problem by correcting the programming
    error to ensure that if enough free space exists after some
    messages have been consumed, the algorithm correctly
    determines that the store is no longer full.
    
    Even with the corrected algorithm, once the store has become
    full it can only become not full again after a checkpoint
    of the Log file has been completed.
    The checkpoint reconciles all message sends and receives since
    the last checkpoint, and might take some time to complete.
    
    The fix for this APAR also introduces a messaging engine
    custom property to control how likely the messaging engine is
    to throw exceptions to applications while recovering from a
    full store:
    
    sib.msgstore.storeFullWaitForCheckPoint
    
    If the property is 'false', an application thread attempting
    to send a message when the store is full will request that a
    checkpoint is performed, and then immediately throw a
    ObjectStoreFullException to the application.
    
    If the property is 'true', the thread will request a
    checkpoint and wait until it has completed before returning.
    If the checkpoint has been able to free space in the store,
    then the thread can proceed and send messages.  However, if
    after the checkpoint the store is still full, the thread will
    still get ObjectStoreFullException.
    
    The default value of this property is 'false'.
    
    The primary case where a user might choose to set this
    property to 'true', is when applications logically know that
    the store is no longer full because it has deleted all
    messages, and requires that a subsequent attempt to
    send a message will succeed. With the default value of
    'false', these applications might still receive exceptions
    (and need to retry the send) while the checkpoint completes
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 6.1.0.33 and 7.0.0.13.  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

    PM10591

  • Reported component name

    PLAT MSG COM

  • Reported component ID

    620600101

  • Reported release

    200

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-03-23

  • Closed date

    2010-04-29

  • Last modified date

    2010-05-04

  • 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

    PLAT MSG COM

  • Fixed component ID

    620600101

Applicable component levels

  • R200 PSY

       UP



Document information

More support for: WebSphere Application Server
Service Integration Technology

Software version: 6.1

Reference #: PM10591

Modified date: 04 May 2010