PH26451: ODRLIB should consider all VCs when searching for the server app a request has affinity with in multi-cell topologies

APAR status

• Closed as program error.

Error description

• In a multi-cell environment where there are identical
  web-modules in more than one cell, affinity will not be
  preserved unless the first module we check happens to be the
  one we have affinity with.  Since we load balance across the
  cells, choosing sequentially among them, this gives you only
  a 1 in N chance to keep affinity, where N is the number of
  cells with that web-module available.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server WAS ND edition- Virtual              *
  *                  Enterprise/IM Component                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: Request sent to different server        *
  *                      instead of the one it has affinity      *
  *                      with                                    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  There was a programming error that caused us to break affinity
  if the first server we considered wasn't the one the request had
  affinity with.
  

Problem conclusion

• We retain affinity with the server now unless there is some
  other reason that affinity is not retained.
  
  The fix for this APAR is currently targeted for inclusion in fix
  pack 9.0.5.6.  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 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