PM96581: Thousands of CWOBJ7663W messages occuring in server logs

APAR status

• Closed as program error.

Error description

• The WebSphere eXtreme Scale container log files contain
  thousands of occurrances of the message "CWOBJ7663W:
  Near-cache invalidation notification has been disconnected for
  grid <gridname>, map <mapname>, partition <n>, the near cache
  has been disabled". All grid function otherwise appears normal.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Users of WebSphere eXtreme Scale that       *
  *                  require near cache invalidation and dynamic *
  *                  maps.                                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: Thousands of near-cache invalidation    *
  *                      notification messages (CWOBJ7663W)      *
  *                      output to the server logs.              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When a WebSphere eXtreme Scale configuration includes support
  for near cache invalidation in addition to the use of
  dynamic maps (sometimes called template maps), some servers
  will generate many CWOBJ766W messages. It is important to
  note that the grid functions as expected when these messages
  are generated.
  For the servers that receive these messages, it indicates
  that there are not yet any transactions for the map indicated
  in the message. Therefore, the map has not yet dynamically
  been created on that server. The result is  that near cache
  invalidation is disconnected from the map in question, and
  that server attempts to try again later. The server continues
  to retry the cache invalidation processing for the map. The
  message repeats until the dynamic map is created. When the
  dynamic map gets created,  the near cache invalidation
  connection to the map is re-established.
  

Problem conclusion

• The near cache invalidation process incorrectly expected
  that all dynamic maps are created on all servers immediately.
  This error is corrected.
  

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

  WS EXTREME SCAL

• Fixed component ID

  5724X6702

Applicable component levels

• R860 PSY

     UP