PQ70772: DEADLOCK ISSUE IN SESSION PERSISTENCE CODE

 Fixes are available

5.0.1: WebSphere Application Server Version 5.0 Fix Pack 1 (Version 5.0.1)
5.0.1: WebSphere Application Server Enterprise Edition Version 5.0 Fix Pack 1



APAR status
Closed as program error.

Error description
I have gone through the javacores and there appears to be a
deadlock occurring within the session manager which causes
connections to get held up by it.
Local fix
Not applicable
Problem summary
****************************************************************
* USERS AFFECTED: WebSphere Application Server -- Session      *
*                 Manager Users                                *
****************************************************************
* PROBLEM DESCRIPTION: Deadlock condition can occur in the     *
*                      Session Manager under heavy load        *
*                      conditions.                             *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
A deadlock was seen in the Session Manager under very heavy
load causing a deadlock to occur between two threads trying to
access the same resource.  The deadlock was seen when a thread
was trying to access a session while another thread was trying
to remove it from the in memory cache because the cache was
filled.
Problem conclusion
The deadlock condition is now avoided by shifting the
synchronization points in the Session Manager.
Temporary fix
PQ68480
Comments
APAR information
APAR number PQ70772
Reported component name WAS BASE 5.0
Reported component ID 5630A3600
Reported release 00S
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2003-02-07
Closed date 2003-02-07
Last modified date 2003-02-07

APAR is sysrouted FROM one or more of the following:
PQ68480

APAR is sysrouted TO one or more of the following:

Modules/Macros
SESSIONS          

Publications Referenced

Fix information
Fixed component name WAS BASE 5.0
Fixed component ID 5630A3600

Applicable component levels
R00S PSY    UP


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > General
Operating system(s):
Software version: 00S
Software edition:
Reference #: PQ70772
IBM Group: Software Group
Modified date: Feb 7, 2003