PQ54783: IF HTTPSESSION SWITCH BETWEEN 2 CLONES THE SESSION COULD BE NOT UPDATED

APAR status
Closed as program error.

Error description
This problem occurs only when there is a switch between the two
clones for a HttpSession.For example if clone1 receives the
first request creates a session object and after that all
subsequent requests to the second clone.
Local fix Problem summary
r uses cache id to maintain the latest version of the session ob
ject in the cache. With URL Rewriting there might be  scenarios
where a URL containing an obsolete session id might be sent over
from a browser. This normally should not matter once session aff
inity is established. However, in failover cases there might be
windows where the session manager may use the stale object inste
ad of going to the database leading to loss of session data.
Problem conclusion
arguement called verifyDatabaseCopy has been introduced which wh
en set to true will cause the session manager to compare the las
t accessed time from the database  with the in memory
copy and in case of a mismatch will cause the session object to
be read in from the database.It needs to be noted that this wil
l introduce some amount of performance degradation since each re
quest for a session object will execute an additional sql statem
t to the database.
Temporary fix Comments
APAR information
APAR number PQ54783
Reported component name WEBSPHERE AE AI
Reported component ID 5630A2200
Reported release 400
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Submitted date 2001-11-14
Closed date 2001-11-14
Last modified date 2001-11-14

APAR is sysrouted FROM one or more of the following:
PQ50400

APAR is sysrouted TO one or more of the following:

Modules/Macros
SESSIONS          

Fix information
Fixed component name WEBSPHERE AE AI
Fixed component ID 5630A2200

Applicable component levels
R400 PSY    UP


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > General
Operating system(s):
Software version: 400
Software edition:
Reference #: PQ54783
IBM Group: Software Group
Modified date: Nov 14, 2001