PM80564: Users see a java.lang.LinkageError in com.ibm.ws.objectgrid.security.MapPermissionCheckAction

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APAR status

  • Closed as program error.

Error description

  • The com.ibm.ws.objectgrid.security.AccessClassLoader has
    several get methods to retrieve singleton objects. The methods
    are not synchronized so two get's called nearly simultaneously
    may cause two objects to be created causing the LinkageError.
    This APAR fixes the synchronization issue.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Users of WebSphere eXtreme Scale with       *
    *                  security enabled.                           *
    ****************************************************************
    * PROBLEM DESCRIPTION: Users see a java.lang.LinkageError in   *
    *                      com.ibm.ws.objectgrid.security.MapPermi *
    *                      ssionCheckAction                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The com.ibm.ws.objectgrid.security.AccessClassLoader has
    several get methods to retrieve singleton objects which are
    not synchronized. If multiple calls come into the
    unsynchronized method two instances of the singleton may be
    created yielding the LinkageError.
    

Problem conclusion

  • Added synchronization to the methods to make sure only one
    instance is created.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM80564

  • Reported component name

    WS EXTREME SCAL

  • Reported component ID

    5724X6702

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-01-14

  • Closed date

    2013-03-27

  • Last modified date

    2013-03-27

  • 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

    WS EXTREME SCAL

  • Fixed component ID

    5724X6702

Applicable component levels

  • R850 PSY

       UP



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Document information


More support for:

WebSphere eXtreme Scale

Software version:

850

Reference #:

PM80564

Modified date:

2013-03-27

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