PM51214: NATIVE MEMORY LEAK IN CONTROL REGION UNDER LOAD

6.1.0.47: WebSphere Application Server V6.1 Fix Pack 47
6.1.0.45: Java SDK 1.5 SR14 Cumulative Fix for WebSphere Application Server
6.1.0.47: Java SDK 1.5 SR16 Cumulative Fix for WebSphere Application Server
Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Control Region got native OOM. There were full of 0x2008 size
  malloc'ed elements. Quite a lot of them had eye catcher of
  BBOMETA.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server for z/OS V6.1.0                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: A Websphere for z/OS Application Server *
  *                      controller receives a native out of     *
  *                      memory exception under load when many   *
  *                      TCP/IP read failures have occurred.     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  During certain error paths the controller may run out of
  native storage as native storage buffers associated with TCP/IP
  read requests are not being released when the buffers are
  returned to the storage pool. The messages in the log may vary
  but will generally be like the following:
  Trace: 2011/08/04 14:15:28.999 01 t=7C41E0 c=UNK key=S2
  (00000004)
  Description: Throw CORBA system exception
  exception id: CORBA::NO_MEMORY
  minor code: c9c2e328
  from filename: ./bbocdbbm.cpp
  at line: 66
  Trace: 2011/08/04 14:15:28.999 01 t=7C41E0 c=UNK key=S2
  (04072019)
  Description: Java exception created
  from filename: ./bboocjex.cpp
  Method Name: createExceptionForJava(JNIEnv *, char *,
  unsigned int,
  CORBA::CompletionStatus, CORBA::Exception *, char *,
  CORBA::Bo
  olean, CORBA::Boolean)
  org.omg.CORBA.NO_MEMORY: Exception occured during native
  method call
  from JAVA  vmcid: 0xc9c2e000  minor code: 328  completed:
  No
  at
  com.ibm.ws.buffermgmt.impl.ZOSWsByteBufferPoolManagerImpl.alloca
  teDirect
  ByteBuffer(Native Method)
  at
  com.ibm.ws.buffermgmt.impl.ZOSWsByteBufferPoolManagerImpl.alloca
  teBuffer
  Direct(ZOSWsByteBufferPoolManagerImpl.java:83)
  

Problem conclusion

• The code has been changed to release any native storage buffers
  that have not been freed before the buffers are returned to
  the storage pool.
  
  APAR PM51214 is currently targeted for inclusion in Service
  Level (Fix Pack) 6.1.0.45 of WebSphere Application Server V6.1.
  
  Please refer to URL:
  //www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
  for Fix Pack availability.
  

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

  WEBSPHERE FOR Z

• Fixed component ID

  5655I3500

Applicable component levels

• R610 PSY UK81646

     UP12/09/23 P F209

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.