PK90271: THE USE OF SCRIPTING DOES NOT SUPPLY JAVACORE DUMP OF THE CONTROL REGION.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• WSADMIN does not provide a way to take a JAVACORE dump for
  Control Regions.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of WebSphere Application Server    *
  *                 V7.0                                         *
  *                                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: The AdminControl "dumpThreads"          *
  *                      command produces no output when run     *
  *                      against a z/OS nodeagent.               *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The AdminControl dumpThreads command is used on z/OS to obtain
  a javacore file. This command does not work for a server that
  contains only a control region and no servant regions, such as a
  nodeagent.
  
  For example, in a nodeagent, a heapdump can be obtained, but
  not a javacore, as shown:
  
  wsadmin>jvm =
  
  AdminControl.completeObjectName('type=JVM,process=nodeagent,node
  =mynode,*')
  
  wsadmin>print jvm
  
  WebSphere:name=JVM,process=nodeagent,platform=proxy,node=mynode,
  j2eeType=JVM,J2EEServer=nodeagent,version=6.1.0.18,type=JVM,
  mbeanIdentifier=JVM,cell=mycell,spec=1.0
  
  wsadmin>heapdump = AdminControl.invoke(jvm, 'generateHeapDump')
  
  wsadmin>print heapdump
  /var/WebSphere/home/WSCFG1/heapdump.20090209.190656.83886129.000
  1.phd
  
  wsadmin>javacore = AdminControl.invoke(jvm, 'dumpThreads')
  
  wsadmin>print javacore
  
  Note that the dumpThreads command does not return an error but
  no javacore is generated.
  
  The problem is that the Application Server code that requests a
  thread dump retrieves a set of servant regions and calls
  dumpThreads for each servant, but if the set of servants is
  null (which it always will be on a nodeagent), this method
  does nothing.
  

Problem conclusion

• The code was updated to call the dumpThreads method on the
  local MBean in the case where the set of servants is null.
  Please note that even after applying this fix, the wsadmin
  "print javacore" command from the example above will still
  return nothing, but the javacore files will be produced.
  
  APAR PK90271 is currently targeted for inclusion in Service
  Level (Fix Pack) 7.0.0.5 of WebSphere Application Server V7.0.
  
  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:

  PK79747

• APAR is sysrouted TO one or more of the following:

Modules/Macros

• BBGUBINF BBOUBINF
  

Fix information

• Fixed component name

  WEBSPHERE FOR Z

• Fixed component ID

  5655I3500

Applicable component levels

• R700 PSY UK48201

     UP09/07/27 P F907

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.