PI28908: AUTOMATIC PLACEMENT CONTROLLER CANNOT MAKE ANY PLACEMENT DECISIONS WHEN RESTARTED ON A NODEAGENT

8.5.5.5: WebSphere Application Server V8.5.5 Fix Pack 5
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
Copy of: 8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
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

• WebSphere Application Server 8.5.
  
  The following steps may be taken to recreate the scenario:
  
  1. The Automatic Placement Controller (APC) is running on NA1
  (Nodeagent 1) and the node is set maintenance mode.
  
  2. The APC moves to NA2 (Nodeagent 2).
  
  3. Later NA1 is set to normal mode and APC moves back to NA1.
  
  Now the  nodes and clusters information on APC is missing, as
  evidenced by this message in the apc.log files:
  
  Cluster Resource Allocation:
   No data
  
  At this point, APC is no longer working effectively.
  

Local fix

• Restart nodeagent.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server 8.5.5                                *
  ****************************************************************
  * PROBLEM DESCRIPTION: Automatic Placement Controller (APC)    *
  *                      cannot make any placement decisions     *
  *                      when restarted on a nodeagent           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When Automatic Placement Controller (APC) is re-activated on a
  Nodeagent after being disabled, the cluster info is corrupted
  and the APC controller cannot make placement decision.
  

Problem conclusion

• The APC code handling cluster info is changed to protect the
  info data after reactivation.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.5.5.5. 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 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

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