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PI89672: OUTOFMEMORYERROR IN ARRAYLIST CONTAINING OBJECTS OF TYPE COM.IBM.WS.LOGGING.INTERNAL.IMPL.INTROSPECTIONLEVELMEMBER

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APAR status

  • Closed as program error.

Error description

  • A java.lang.OutOfMemoryError occured when one or more
    ArrayLists containing a large number of objects of type
    com.ibm.ws.logging.internal.impl.IntrospectionLevelMember
    
    Reviewing the phd file showed multiple ArrayLists
    java.util.ArrayList @ 0x802ca320 - 89,835,568 (9.54%) bytes.
    java.util.ArrayList @ 0x83174258 - 89,835,568 (9.54%) bytes.
    java.util.ArrayList @ 0x83e37be0 - 89,835,568 (9.54%) bytes.
    java.util.ArrayList @ 0x84fc92e8 - 89,835,568 (9.54%) bytes.
    java.util.ArrayList @ 0x8a842fa8 - 89,835,568 (9.54%) bytes.
    java.util.ArrayList @ 0x8d123c98 - 89,835,568 (9.54%) bytes.
    java.util.ArrayList @ 0x91532d78 - 89,835,568 (9.54%) bytes.
    java.util.ArrayList @ 0x9b6bcb68 - 89,835,568 (9.54%) bytes
    
    where each ArrayList contained:
    90,335,736 (9.61%) [2,160,864] 500,015 array of
    java/lang/Object
    |- 500,368 (0.05%) [32] 4
    com/ibm/ws/logging/internal/impl/IntrospectionLevelMember
    |- 176 (0%) [32] 3
    com/ibm/ws/logging/internal/impl/IntrospectionLevelMember
    |- 176 (0%) [32] 3
    com/ibm/ws/logging/internal/impl/IntrospectionLevelMember
    |- 176 (0%) [32] 3
    com/ibm/ws/logging/internal/impl/IntrospectionLevelMember
    |- 176 (0%) [32] 3
    com/ibm/ws/logging/internal/impl/IntrospectionLevelMember
    |- There are 499,995 more children
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server Liberty - Debug/Tracing              *
    ****************************************************************
    * PROBLEM DESCRIPTION: OutOfMemoryError in ArrayList           *
    *                      containing objects of type              *
    *                      com.ibm.ws.logging.internal.impl.Intros *
    *                      pectionLevelMember                      *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    A java.lang.OutOfMemoryError occured when one or more ArrayLists
    contained a large number of objects of type
    com.ibm.ws.logging.internal.impl.IntrospectionLevelMember.
    

Problem conclusion

  • This problem was caused by an FFDC log file which captured an
    arrary with many elements. The code has been corrected by Open
    Liberty GIT issue 1039 (https://github.com/OpenLiberty/open-
    liberty/issues/1039).
    
    The fix for this APAR is currently targeted for inclusion in fix
    pack 17.0.0.4.  Please refer to the Recommended Updates page for
    delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

  • The problem only happens when FFDC occurs and try to log a large
    array. No workaround.
    

Comments

APAR Information

  • APAR number

    PI89672

  • Reported component name

    LIBERTY PROF -

  • Reported component ID

    5655W6514

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-11-01

  • Closed date

    2017-11-30

  • Last modified date

    2017-11-30

  • 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

    LIBERTY PROF -

  • Fixed component ID

    5655W6514

Applicable component levels

  • R850 PSY

       UP

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Document Information

Modified date:
14 December 2020