PI82527: ODR SESSION AFFINITY BREAKS WHEN REQUEST CONTAINS MULTIPLE SESSION COOKIES OF THE SAME NAME

Fixes are available

APAR status

Closed as program error.

Error description

When the Cookie request header contains multiple session
cookies of the same name (ie. JSESSIONID), the ODR currently
only looks at the first one.  If that first cookie does not
have a valid cloneID for this cell, session affinity is
broken.

The ODR code needs to be changed to look at ALL session
cookies
in the Cookie request header and look for ANY valid cloneID.

Local fix

The work around is to change the session cookie name in the WAS
configuration to something unique, so that each WAS cluster
will have a different session cookie name.

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server WAS ND edition- Virtual              *
*                  Enterprise/IM On Demand Router (ODR)        *
*                  Component                                   *
****************************************************************
* PROBLEM DESCRIPTION: The On Demand Router (ODR) breaks       *
*                      session affinity when the request       *
*                      Cookie header contains duplicate        *
*                      session cookie keys.                    *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The On Demand Router (ODR) breaks session affinity when the
request Cookie header contains duplicate session cookie keys
(e.g. JSESSIONID). The ODR currently only looks at the first
session cookie key, as it is expecting only one, in the request
Cookie header. If the first session cookie processed by the ODR
does not contain a valid Clone/Partition ID then session
affinity is lost.

Problem conclusion

The xd.dwlm.client component of the On Demand Router (ODR) has
been altered to examine all session cookie keys in the Cookie
header of a request ensuring a valid Clone/Partition ID is found
and session affinity is maintained.

The fix for this APAR is currently targeted for inclusion in fix
packs 8.5.5.13 and 9.0.0.5.  Please refer to the Recommended
Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PI82527
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-06-02
Closed date
2017-09-11
Last modified date
2017-09-11

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

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":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
04 May 2022

Tips

PI82527: ODR SESSION AFFINITY BREAKS WHEN REQUEST CONTAINS MULTIPLE SESSION COOKIES OF THE SAME NAME

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

R850 PSY

Document Information

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