PQ74517: CALLING GETSESSION() AFTER CALLING SESSION.INVALIDATE() CAUSES APERFORMANCE SLOWDOWN

 A fix is available

5.0.2: WebSphere Application Server Version 5.0 Fix Pack 2 (Version 5.0.2)



APAR status
Closed as program error.

Error description
The following pattern causes a performance degradation.
Server code invalidates the HttpSession by calling
session.invalidate() and then calls getSession().
The performance degradates after repeating this pattern.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: WebSphere Application Server users of        *
*                 session tracking with logout and login.      *
****************************************************************
* PROBLEM DESCRIPTION: After a session.invalidate() method is  *
*                      called, the method call getSession()    *
*                      will have a performance slow down       *
*                      under a stress test.                    *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The problem is caused by the searching of the session ID from
other servers. The session.invalidate() method will first be
disabled but the next jsp being displayed and the server tried
to retrieve the session from all the servers.
Problem conclusion
Try not to remove the session ID immediately after
invlidating it.
Temporary fix
WAS_Sessions_06-11-2003_5.0.1-5.0.0_cumulative_Fix.jar
Comments
APAR information
APAR number PQ74517
Reported component name WAS NETWRK DEPL
Reported component ID 5630A3601
Reported release 00I
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2003-05-22
Closed date 2003-07-31
Last modified date 2003-07-31

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
session          

Publications Referenced

Fix information

Applicable component levels
R00H PSY    UP
R00I PSY    UP
R00P PSY    UP
R00S PSY    UP
R00W PSY    UP


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > General
Operating system(s):
Software version: 00I
Software edition:
Reference #: PQ74517
IBM Group: Software Group
Modified date: Jul 31, 2003