PH34493: OOM CAUSED BY PROBER STORING PROBE RECORDS FOR ALL SLOW CLIENT .

APAR status

• Closed as program error.

Error description

• OutofMemory caused by Prober storing probe records for
  all slow client .
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Users of eXtreme Scale who use near cache   *
  *                  on                                          *
  *                  wxs client.                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: Customer experienced an OOM on one of   *
  *                      the                                     *
  *                      WXS containers due to prober storing    *
  *                      records for slow wxs client.            *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The customer experienced an OutOfMemoryError, and the analysis
  of
  the heap dump shows that the primary driver of the heap
  exhaustion
  was com.ibm.ws.xs objects. In particular, a ConcurrentHashMap is
  occupying 2.4GB of the 3GB heap, and it's composed of
  com.ibm.ws.xs.xio.flowcontrol.server.impl.SlowClientEntry
  objects,
  some as large as 142MB.
  Checking incoming references to the ConcurrentHashMap, shows
  references from a
  com.ibm.ws.xs.xio.flowcontrol.server.impl.Prober
  and a com.ibm.ws.xs.xio.flowcontrol.server.policies.MIMD.
  

Problem conclusion

• WXS Prober code has been updated to fix the memory leak. The fix
  is available in 8.6.1.5 fix-pack.
  

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