PK29877: SESSION INVALIDATION OCCURS MULTIPLE TIMES IN MEM TO MEM MODE. | |||||||||||||||||||||||||||||||||||||||||||
![]() |
|||||||||||||||||||||||||||||||||||||||||||
![]() 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occurred due to a network problem, the session remained in the active session cache but it's last accessed time was no longer updated even though the session was being used in a different server.Problem conclusion The code was modified to only invalidate sessions based on the backup session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 is sysrouted FROM one or more of the following: APAR is sysrouted TO one or more of the following: Modules/Macros
Publications Referenced
|
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
(C) Copyright IBM Corporation 2000, 2009. All Rights Reserved.