PI12798: The catalog server can leak memory over time, which can cause out of memory errors.

APAR status

• Closed as program error.

Error description

• When movement of the primary catalog occurs because of
  detected failures, and concurrent container failures are
  detected by the catalog server, this memory leak can be more
  prevalently seen.
  
  LockTimeoutException exception instances can take up a bulk of
  the memory because the exception messages contain the entire
  list of keys that are locked for particular transactions.
  

Local fix

• TBD
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of WebSphere eXtreme Scale.       *
  ****************************************************************
  * PROBLEM DESCRIPTION: Out of memory errors can occur in the   *
  *                      catalog server, especially in larger    *
  *                      topologies with numerous partitions.    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The cause of the memory leak had to do with a placement state
  that was not cleared correctly.  The logic was updated so
  that now the state is cleared correctly.
  Additionally, the LockTimeoutException exception class was
  updated to stop creating additional message text after a
  threshold is reached.  Now, when including the keys that
  are locked in a particular transaction in the exception
  message, only a subset of the keys that have been locked in
  the transaction are included, instead of including all of them
  if the number of keys is greater than the threshold.
  

Problem conclusion

• An interim fix is available for this APAR.
  

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

• R850 PSY

     UP

• R860 PSY

     UP