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PM21512: MULTI-THREAD USAGE MAY RESULT IN EJB INITIALIZATION FAILURE WSVR0068E CNTR0169E JAVA.LANG.NULLPOINTEREXCEPTION

Fixes are available

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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APAR status

  • Closed as program error.

Error description

  • When an EJB is invoked at the same time on two threads (for
    example, two requests for the same EJB arrives simultaneously),
    the following error may be encountered:
    
     Trace: 2010/07/14 05:22:00.153 01 t=8C4988 c=UNK key=P8
    (13007002)
       ThreadId: 0000001b
       FunctionName: com.ibm.ws.runtime.component.EJBContainerImpl
       SourceId: com.ibm.ws.runtime.component.EJBContainerImpl
       Category: SEVERE
       ExtendedMessage: BBOO0220E: WSVR0068E: Attempt to start
    EnterpriseBean TestEAR#TestEAREjb.jar#TestEJB failed
    withexception: java.lang.NullPointerException
      at
    com.ibm.ejs.csi.EJBModuleMetaDataImpl.freeResourcesAfterAllBeans
    Initialized(EJBModuleMetaDataImpl.java:807)
      at
    com.ibm.ws.runtime.component.EJBContainerImpl.initializeDeferred
    EJB(EJBContainerImpl.java:4899)
      at
    com.ibm.ejs.container.HomeOfHomes$1.run(HomeOfHomes.java:406)
      at
    com.ibm.ws.security.util.AccessController.doPrivileged(AccessCon
    troller.java:118)
      at
    com.ibm.ejs.container.HomeOfHomes.getHome(HomeOfHomes.java:403)
    
    Preceeding the above error a CNTR0169E may be issued:
     Trace: 2010/08/23 09:29:13.969 01 t=8C4890 c=UNK key=P8
    (00000011)
       Description: Log Java Message
       Message: BBOO0221W: CNTR0169E: The TestEJB enterprise
    bean, which is specified in the session binding within the
    TestEAREjb.jar module, does not exist.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server V7.0                                 *
    ****************************************************************
    * PROBLEM DESCRIPTION: Multi-threaded initialization of        *
    *                      multiple EJBs within the same module    *
    *                      may result in a NullPointerException    *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The EJBContainer defers the initialization of EJBs until they
    are first used during runtime.   When all EJBs for a module
    have been initialized, resources used for the initialization
    are cleaned up.  In a multi-threaded environment there exists
    a window in which the last two EJBs in the module may be
    initialized simultaneously and both attempt to clean up the
    resources.  This will result in the second attempt failing
    with the NullPointerException listed in the problem
    description of this APAR.
    

Problem conclusion

  • The EJBContainer code has been changed such that only one
    thread will be allowed to perform the resource cleanup once
    all EJBs within a module have been initialized.
    
    APAR PM21512 is currently targeted for inclusion in Service
    Level (Fix Pack) 7.0.0.15 of WebSphere Application Server V7.0.
    
    Please refer to URL:
    //www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
    for Fix Pack availability.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM21512

  • Reported component name

    WEBSPHERE FOR Z

  • Reported component ID

    5655I3500

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-08-30

  • Closed date

    2010-09-15

  • Last modified date

    2011-04-04

  • 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

    WEBSPHERE FOR Z

  • Fixed component ID

    5655I3500

Applicable component levels

  • R700 PSY UK65060

       UP11/03/04 P F103

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



Document information

More support for: WebSphere Application Server for z/OS
General

Software version: 7.0

Reference #: PM21512

Modified date: 04 April 2011