PI34299: AFTER UPGRADING TO WAS 8.5.5.2 THE MBEAN OF WEBCONTAINER THREADPOOL METRIC NOW CONTAINS 2 MBEAN INSTEAD OF ONE.

8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• customer has problems to query the WebContainer MBean since he
  has updated to WAS v8.5.5.2
  .
  WAS v8.5.5.2 on AIX (recreated the same locally on Windows)
  .
  AdminControl.queryNames('name=WebContainer,type=ThreadPool,proce
  ss=serve r1,*')   returns two MBeans, one valid and the other
  one with mbeanIdentifier=null
  .
  This is causing trouble in the customer's WAS monitoring, as
  VMWare Hyperic (and probably other JMX related tools as well)
  expect only one MBean to be returned.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server ThreadPool MBeans.                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: The Application Server exports a        *
  *                      vestigial ThreadPool MBean for every    *
  *                      thread pool in the server               *
  *                      configuration.                          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The Application Server unexpectedly registers two ThreadPool
  instances for every ThreadPool declared the server
  configuration: a usable instance containing a valid
  mbeanIdentifier field, and a vestigial instance
  containing a null mbeanIdentifier.
  For example, when using the wsadmin application to query the
  WebContainer ThreadPool MBean:
  wsadmin>$AdminControl queryNames
  *,type=ThreadPool,name=WebContainer
  The application returns two MBean instances:
  1.
  WebSphere:name=WebContainer,process=server1,platform=dynamicprox
  y,node=DABOT-
  1Node13,version=8.5.5.5,type=ThreadPool,mbeanIdenti
  fier=cells/DABOT-1Node15Cell/nodes/DABOT-
  1Node13/servers/server1
  /server.xml#ThreadPool_1183122130079,cell=DABOT-
  1Node15Cell,spec
  =1.0
  2.
  WebSphere:name=WebContainer,process=server1,platform=dynamicprox
  y,node=DABOT-
  1Node13,version=8.5.5.5,type=ThreadPool,mbeanIdenti
  fier=null,cell=DABOT-1Node15Cell,spec=1.0
  This problem may impact applications that expect such queries
  to return a single MBean instance.
  

Problem conclusion

• WebSphere Application Server was modified to export exactly
  one ThreadPool instance for each thread pool declared in the
  server configuration.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.5.5.6.  Please refer to the Recommended Updates
  page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

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

• R850 PSY

     UP