PI40358: Concurrent cluster membership changes can result in a member bei ng removed from a cluster.

8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• When the removal of the last member of a cluster overlaps
  the readdition of the member to the cluster, or the addition
  of another member, the member can be removed from the
  cluster. It will remain removed from the cluster until the
  member is restarted.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Libetry Profile collectives          *
  ****************************************************************
  * PROBLEM DESCRIPTION: Concurrent cluster membership changes   *
  *                      can result in a member being removed    *
  *                      from a cluster.                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When the removal of the last member of a cluster overlaps the
  readdition of the member to the cluster, or the addition of
  another member, the member can be removed from the cluster.  It
  will remain removed from the cluster until the member is
  restarted.
  

Problem conclusion

• The code was updated to prevent the problem.
  
  The fix for this APAR is currently targeted for inclusion in fix
  pack 8.5.5.6.  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

  LIBERTY PROFILE

• Fixed component ID

  5724J0814

Applicable component levels

• R850 PSY

     UP