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PI11425: ConcurrentModificationException in CreationalContextImpl under load

Fixes are available

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
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
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
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
PI11425:ConcurrentModificationException in CreationalContextImpl under load
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
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
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
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

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APAR status

  • Closed as program error.

Error description

  • Under very high load, a
    java.util.ConcurrentModificationException might be thrown by
    org.apache.webbeans.context.creational.CreationalContextImpl.
    

Local fix

  • na
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  IBM WebSphere Application Server Full       *
    *                  Profile versions 8.0 and 8.5.5 users of     *
    *                  Contexts and Dependency Injection (CDI).    *
    ****************************************************************
    * PROBLEM DESCRIPTION: CreationalContextImpl incorrectly       *
    *                      synchronizes updates to an internal     *
    *                      Map leading to problems in a            *
    *                      multi-threaded environment              *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The CDI implementation incorrectly synchronizes updates to an
    internal Map, which might lead to a
    java.util.ConcurrentModificationException. The exception might
    look like the one below:
    Caused by: java.util.ConcurrentModificationException
    at
    java.util.WeakHashMap$HashIterator.next(WeakHashMap.java:244)
    at
    org.apache.webbeans.context.creational.CreationalContextImpl.rem
    oveAllDependents(CreationalContextImpl.java:368)
    

Problem conclusion

  • The CDI implementation was modified to correctly synchronize
    its activity in CreationalContextImpl to avoid the
    ConcurrentModificationException.
    
    The fix for this APAR is currently targeted for inclusion in
    fix packs 8.0.0.9 and 8.5.5.3.  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

    PI11425

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2014-02-10

  • Closed date

    2014-03-07

  • Last modified date

    2016-05-19

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    PI54920

Fix information

  • Fixed component name

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels

  • R800 PSY

       UP

  • R850 PSY

       UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 April 2022