PI71230: EXECUTION GROUP INCREASES CPU CONSUMPTION AFTER A JAVA OOM BECAUSE OF A WXS GLOBAL CACHE THREAD LEAK

APAR status

• Closed as program error.

Error description

• An execution group process hosting the embedded global cache can
  experience Java out of memory exceptions and an increase in CPU
  consumption due to WebSphere eXtreme Scale (WXS) APAR PI70751.
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All users of WebSphere Message Broker v8.0 and IBM Integration
  Bus v9.0 and v10.0 using the embedded global cache.
  
  
  Platforms affected:
  z/OS, MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  The embedded global cache is a WebSphere eXtreme Scale (WXS)
  grid, which consists of WXS catalog and container servers that
  are hosted in the execution group's process. Therefore, the
  catalog and container servers share their Java virtual machines
  (JVMs) with all other components that are running in the
  execution group and the lifecycle of each cache server is tied
  to the lifecycle of the execution group in which it is hosted.
  
  The execution group process hosting the embedded global cache
  can experience Java out of memory exceptions and an increase in
  CPU consumption. This is due to WXS APAR PI70751, where a large
  number of threads are spawned when attempting to restart the
  catalog server in the case of a network partition with another
  catalog server.
  
  There are a number of resource name changes between WebSphere
  Message Broker and IBM Integration Bus Version 9.0.  For details
  visit
  http://pic.dhe.ibm.com/infocenter/wmbhelp/v9r0m0/topic/com.ibm.e
  tools.mft.doc/bb23814_.htm
  

Problem conclusion

• The version of the embedded global cache shipped in the product
  has been updated to include APAR PI70751.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v10.0      10.0.0.7
  v8.0       8.0.0.9
  v9.0       9.0.0.7
  
  The latest available maintenance can be obtained from:
  http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
  
  If the maintenance level is not yet available,information on
  its planned availability can be found on:
  http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
  ---------------------------------------------------------------
  

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

  WEB MB Z/OS

• Fixed component ID

  5697P4400

Applicable component levels

• R800 PSY

     UP