PI07361: NEED AN OPTION TO IGNORE THE $WSFO FLAG IF THE REPLICATION IS DOWN

Fixes are available

APAR status

Closed as program error.

Error description

When using the peer-to-peer topology of memory-to-memory session
replication with 2 cluster members, the replication domain will
be down if 1 of 2 server is down. If the request that is affined
to the server comes to the web server, the web server plug-in
will send the request to the other server. If the plug-in adds
the internal $WSFO flag into the request header for the other
server to prevent the stale session data from returning to the
client, the user will fail to get the session because the
session manager will try to retrieve the session from the
original server that is down although the other server already
has the copy of session.

Need the option to ignore the $WSFO flag if the replication is
down. With the option, the user can choose whether the
application can get the session in the backup server or don't
use the session to prevent the possible stale data from
returning to the client.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  IBM WebSphere Application Server full       *
*                  profile version 8.0 and 8.5.5 customers     *
*                  using memory-to-memory session              *
*                  replication.                                *
****************************************************************
* PROBLEM DESCRIPTION: When session replication is down,       *
*                      session manager fails to retrieve the   *
*                      session during failover.                *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When failover occurs, session manager will attempt to go to
the backend to retrieve the latest copy of the session. In
most situations, this behavior is desirable because the
possibility of stale session data on failover is reduced.
However, in cases where the replication domain is down, this
would mean session information already present in memory would
be removed.

Problem conclusion

The session manager has added a new custom property,
IgnoreWSFOHeaderIfReplicationDown (default=false). Set this
property to true to allows the session manager to retrieve
the session from the local memory instead of the backup server
when session replication is down.

The fix for this APAR is currently targeted for inclusion in
fix packs 8.0.0.9 and 8.5.5.3.  Please refer to the
Recommended Updatespage for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PI07361
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-12-04
Closed date
2014-03-07
Last modified date
2014-03-07

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

Fix information

Fixed component name
WEBS APP SERV N
Fixed component ID
5724H8800

Applicable component levels

R800 PSY
UP
R850 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 April 2022

Tips

PI07361: NEED AN OPTION TO IGNORE THE $WSFO FLAG IF THE REPLICATION IS DOWN

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R800 PSY

R850 PSY

Document Information

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