PK29877: SESSION INVALIDATION OCCURS MULTIPLE TIMES IN MEM TO MEM MODE.

 A fix is available

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APAR status
Closed as program error.

Error description
Even though the user's requests are processed and http session
is updated properly on its original server, the time out of
replicated http session (old session) removes meaningful
replicated session in session server.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: All users of WebSphere Application Server    *
*                 V5.0 for z/OS                                *
****************************************************************
* PROBLEM DESCRIPTION: In Memory to Memory Replication with    *
*                      DRS, the replicated server is           *
*                      incorrectly performing invalidation     *
*                      which causes the DRS Get method to      *
*                      return NULL instead of valid session.   *
*                                                              *
*                      ExtendedMessage: !!!superGet returned   *
*                      NULL                                    *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
In Memory to Memory Replication with DRS, HTTP sessions were
being invalidated based on the active session cache.  If a
failover occurred due to a network problem, the session
remained in the active session cache but it's last accessed
time was no longer updated even though the session was being
used in a different server.
Problem conclusion
The code was modified to only invalidate sessions based on the
backup session cache where the last accessed time is always
kept up-to-date.

APAR PK29877 is associated with SERVICE LEVEL W502042 of
WebSphere Application Server V5.0 for z/OS.
Temporary fix Comments
APAR information
APAR number PK29877
Reported component name WEBSPHERE FOR Z
Reported component ID 5655I3500
Reported release 500
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2006-08-15
Closed date 2006-09-05
Last modified date 2006-10-03

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
BBOUBINF          

Publications Referenced

Fix information
Fixed component name WEBSPHERE FOR Z
Fixed component ID 5655I3500

Applicable component levels
R500 PSY UK17760    UP06/09/08 P F609

  Fix is available
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Document Information


Current web document: swg1PK29877.html
Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server for z/OS
Operating system(s):
Software version: 500
Software edition:
Reference #: PK29877
IBM Group: Software Group
Modified date: Oct 3, 2006