IBM Support

PM10845: OBJECTMANAGER USED BY SIBus FILESTORE AND LOTUS EXPEDITOR HANGS UNDER LOAD

Fixes are available

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
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
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
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
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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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • The ObjectManager hangs under load.  A javacore reveals a
    thread is stuck with the following stack:
    
    "CheckpointHelper"
    at com/ibm/ws/objectManager/ConcurrentHashMap.clear
    at com/ibm/ws/objectManager/ObjectManagerState.performCheckpoint
    at com/ibm/ws/objectManager/ObjectManagerState.access$500
    com/ibm/ws/objectManager/ObjectManagerState$CheckpointHelper.run
    at java/lang/Thread.run(Bytecode PC:13)
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Users of the default messaging provider     *
    *                  for IBM WebSphere Application Server and    *
    *                  Lotus Expeditor                             *
    ****************************************************************
    * PROBLEM DESCRIPTION: Under load (high messaging rates)       *
    *                      products using the ObjectManager        *
    *                      hang and messaging cannot continue.     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    An error in the break condition causes an infinite loop which
    results in an apparent hang.  The loop occurs on the
    checkpoint helper threads which means no messaging can occur.
    
    A javacore of the system in this state shows the following
    thread:
    
    "CheckpointHelper"
    at com/ibm/ws/objectManager/ConcurrentHashMap.clear
    at com/ibm/ws/objectManager/ObjectManagerState.performCheckpoint
    at com/ibm/ws/objectManager/ObjectManagerState.access$500
    com/ibm/ws/objectManager/ObjectManagerState$CheckpointHelper.run
    at java/lang/Thread.run(Bytecode PC:13)
    

Problem conclusion

Temporary fix

  • Restarting the system resolves the problem.
    

Comments

APAR Information

  • APAR number

    PM10845

  • Reported component name

    PLAT MSG COM

  • Reported component ID

    620400101

  • Reported release

    100

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-03-25

  • Closed date

    2010-04-01

  • Last modified date

    2010-04-01

  • 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

    620400101

Applicable component levels

  • R100 PSY

       UP



Document information

More support for: WebSphere Application Server
Service Integration Technology

Software version: 6.0

Reference #: PM10845

Modified date: 01 April 2010