PH50582: EXECUTORSERVICESIMPL IS CREATING THREAD POOLS WITH APPLICATION CLASS LOADERS AS THEIR THREAD CONTEXT CLASS LOADERS AND WHETHER T

APAR status

• Closed as program error.

Error description

• There are few thread pools that appear to be abandoned, when
  traced back the instance of the application that was still
  running. That pool appears to have been created not by the
  application, but by the WAS CDI component:
  
  Class Name
                  | Shallow Heap | Retained Heap
  ---------------------------------------------------------------
  -------------------------------------------------
  workers java.util.concurrent.ThreadPoolExecutor @ 0x8155b180
                  |           80 |           488
  '- executorService com.ibm.ws.cdi.impl.weld.ExecutorServicesImpl
  @ 0x84118358    |           16 |            16
  ---------------------------------------------------------------
  -------------------------------------------------
  
  Looks like ExecutorServicesImpl is creating thread pools with
  application class loaders as their thread context class loaders
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: Memory Leak in Executor Service         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A memory leek can be seen, when analysing the memory you see
  that the thread is created by
  com.ibm.ws.cdi.impl.weld.ExecutorServicesImpl
  

Problem conclusion

• ExecutorServicesImpl was modified to ensure it cleans up its
  thread pools properly
  
  The fix for this APAR is targeted for inclusion in fix pack
  9.0.5.15. For more information, see 'Recommended Updates for
  WebSphere Application Server':
  https://www.ibm.com/support/pages/node/715553
  

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