PM77856: Reduce synchronization for HTTP sessions that have been retrieved from the remote data grid to eliminate deadlocks.

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APAR status

  • Closed as program error.

Error description

  • LockTimeoutExceptions exceptions can occur during HTTP session
    synchronization due to hangs caused by extra synchronization
    when sessions are retrieved from the remote data grid.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of WebSphere eXtreme Scale using  *
    *                  HTTP session replication.                   *
    ****************************************************************
    * PROBLEM DESCRIPTION: Users with the splicer property,        *
    *                      replicationInterval=0, configured.      *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    LockTimeoutExceptions exceptions might occur in application
    server logs due to hangs caused by extra synchronization when
    sessions are retrieved from the remote data grid.
    

Problem conclusion

  • The eXtreme Scale client code has been fixed to avoid
    LockTimeoutExceptions exceptions for the previous use case.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM77856

  • Reported component name

    WS EXTREME SCAL

  • Reported component ID

    5724X6702

  • Reported release

    711

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-11-27

  • Closed date

    2012-11-29

  • Last modified date

    2012-11-29

  • 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

  • R711 PSY

       UP

  • R850 PSY

       UP

  • R860 PSY

       UP



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Document information


More support for:

WebSphere eXtreme Scale

Software version:

711

Reference #:

PM77856

Modified date:

2012-11-29

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