IBM Support

PI62090: CLASSLOADER LEAK PROBLEMS

Fixes are available

9.0.0.2: WebSphere Application Server traditional V9.0 Fix Pack 2
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
9.0.0.3: WebSphere Application Server traditional V9.0 Fix Pack 3
9.0.0.4: WebSphere Application Server traditional V9.0 Fix Pack 4
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
9.0.0.5: WebSphere Application Server traditional V9.0 Fix Pack 5
9.0.0.6: WebSphere Application Server traditional V9.0 Fix Pack 6
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
9.0.0.7: WebSphere Application Server traditional V9.0 Fix Pack 7
9.0.0.8: WebSphere Application Server traditional V9.0 Fix Pack 8
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
9.0.0.9: WebSphere Application Server traditional V9.0 Fix Pack 9
9.0.0.10: WebSphere Application Server traditional V9.0 Fix Pack 10
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
9.0.0.11: WebSphere Application Server traditional V9.0 Fix Pack 11
9.0.5.0: WebSphere Application Server traditional Version 9.0.5 Refresh Pack
9.0.5.1: WebSphere Application Server traditional Version 9.0.5 Fix Pack 1
9.0.5.2: WebSphere Application Server traditional Version 9.0.5 Fix Pack 2
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3
9.0.5.4: WebSphere Application Server traditional Version 9.0.5 Fix Pack 4
9.0.5.5: WebSphere Application Server traditional Version 9.0.5 Fix Pack 5
9.0.5.6: WebSphere Application Server traditional Version 9.0.5 Fix Pack 6

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The component of the leak container is
    com.ibm.ws.runtime.component.MemoryLeakMgrImpl
    
    You can find followings
    Class Name
    | Shallow Heap | Retained Heap
    ----------------------------------------------------------------
    --------
    ----------------------------------------------------------------
    ------
    com.ibm.ws.classloader.CompoundClassLoader @ 0xf1e80ca0
    war:30589.999.760.my-test/my-intercepter.war          |
     176 |
    13,616
    |- contextClassLoader java.lang.Thread @ 0xf2a7c0e8
    pool-2-thread-1
    Thread                                    |          144 |
       1,208
    |- <classloader>, <classLoader> class my.MyError @ 0xf1877050
    |          118 |         1,934
    |  '- <class> my.MyError @ 0xf2f52950
    |           32 |         8,192
    |     '- cause
    com.ibm.ws.webcontainer.exception.WebAppNotLoadedException @
    0xf2f52788
    |           32 |        15,064
    |        '- cause
    com.ibm.ws.webcontainer.exception.WebAppNotLoadedException @
    0xf2f526a0
    |           32 |        21,688
    |           '- ivCause, cause
    com.ibm.ws.exception.RuntimeWarning @
    0xf2a71a00                                 |           48 |
    27,864
    |              '- latchedAsynchronousException
    com.ibm.ws.runtime.component.CompositionUnitMgrImpl @
    0xf167fe80|
    80 |        33,880
    |                 '- CUMgr
    com.ibm.ws.runtime.component.ApplicationMgrImpl @ 0xf14eb160
    |          120 |         1,360
    |                    '- appMgr class
    com.ibm.ws.runtime.component.MemoryLeakMgrImpl @ 0xf063c468
    |        2,281 |         4,697
    ----------------------------------------------------------------
    --------
    ----------------------------------------------------------------
    ------
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server                                      *
    ****************************************************************
    * PROBLEM DESCRIPTION: A class loader leak can occur when a    *
    *                      user-defined exception is thrown        *
    *                      during application startup              *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When an exception is thrown during application startup, the
    WebSphere Application Server component framework wraps that
    exception before rethrowing it.  In cases in which the
    exception is user-defined and packaged in an application, the
    reference to the exception class is maintained after the
    application is stopped, causing the application's class loader
    to be leaked.
    Note that this is a singleton leak - if the application is
    restarted and the exception is thrown a second time, the
    initial exception reference will be cleared.
    

Problem conclusion

  • The reference to the application class is now eagerly cleared
    before the wrapping exception is thrown, preventing the leak
    condition.
    
    The fix for this APAR is currently targeted for inclusion in
    fix packs 8.5.5.11 and 9.0.0.2.  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

    PI62090

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-05-08

  • Closed date

    2016-08-24

  • Last modified date

    2016-08-24

  • 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

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels

  • R850 PSY

       UP

  • R900 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"850","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
16 October 2021