IBM Support

PI69664: DATA IN DYNACACHE MAY BE OVERWRITTEN WHEN LTPA TOKENS OF MULTIPLE REQUESTS EXPIRE AT THE SAME TIME.

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APAR status

  • Closed as program error.

Error description

  • When there are multiple incoming requests and LTPA tokens for
    these requests expire at almost the same time, data in
    dynacache may get overwritten.
    

Local fix

  • Disable replication service in dynacache
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server                                      *
    ****************************************************************
    * PROBLEM DESCRIPTION: When the Distributed Cache              *
    *                      Replication service is enabled, the     *
    *                      contents of the distributed cache       *
    *                      might be overwritten.                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When the Distributed Cache Replication service is enabled,
    there is a potential that the contents of the Distributed
    Cache is overwritten. This is due to the logic of
    the duplicate resolution for some type of data in the cache.
    

Problem conclusion

  • With this fix, the code was modified not to use the
    Distriubted Cache for storing the data which is potentially
    introduce the issue.
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 7.0.0.43, 8.0.0.14, 8.5.5.12 and 9.0.0.4.  Please
    refer to the Recommended Updates page for delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI69664

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-09-23

  • Closed date

    2017-02-02

  • Last modified date

    2017-02-02

  • 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

  • R700 PSY

       UP

  • R800 PSY

       UP

  • R850 PSY

       UP



Document information

More support for: WebSphere Application Server
General

Software version: 7.0

Reference #: PI69664

Modified date: 02 February 2017