PK60325: EJB MEDIATION FAILS WITH NULLPOINTEREXCEPTION

Rational Software Architect, Version 7.0.0.7
Rational Application Developer for WebSphere Software, Version 7.0.0.7
6.1.1.7: WebSphere Application Server Toolkit Version 6.1.1 Fix Pack 7

APAR status

• Closed as program error.

Error description

• When using RAD 7- version 7.0.0.5 on Windows XP trying to
  define a mediation handler in the EJB deployment descriptor, the
  process
  fails with a NullPointerException.  Below are the steps to
  reproduce -
  
  1. Created a class implementing the MediationHandler interface
  in a java
  project
  2. Created an EJB project and specified the above java project
  in the
  J2EE Module dependencies.
  3. In the EJB deployment descriptor, selected the Mediation
  Handler tab
  and clicked "Add".
  4. In the 'Define Mediation Handler' dialog, mentioned the name
  and
  selected the Handler class using the 'Browse' button.  The first
  thing
  that seems to be wrong is that any properties on the handler
  class are
  not displayed in the parameters section.
  5. Clicked on 'Finish' and got the error message - "An error has
  occurred when null finnished". Stack trace is below -
  
  
  
  org.eclipse.core.runtime.CoreException: Extended Operation
  failure:
  com.ibm.etools.sib.mediation.deploy.handler.operations.AddMediat
  ionHandl
  erOperation
     at
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users creating an EJB Mediation Handler *
  *                  in Rational Application Developer v7.0 and  *
  *                  WebSphere Application Server Toolkit v6.1.1.*
  ****************************************************************
  * PROBLEM DESCRIPTION: A NullPointerException is written to    *
  *                      the workspace .log file when            *
  *                      selecting to define an EJB mediation    *
  *                      handler in the EJB deployment           *
  *                      descriptor editor.                      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The following exception will be visible in the workspace .log
  file when selecting to defined a new EJB mediation handler:
  
  java.lang.NullPointerException
  
  at com.ibm.etools.sib.mediation.deploy.handler.operations.
  AddMediationHandlerOperation.runEnvEntriesCreationOperatio
  n(Unknown Source)
  at com.ibm.etools.sib.mediation.deploy.handler.operations.
  AddMediationHandlerOperation.execute(Unknown Source)
  at com.ibm.etools.sib.mediation.deploy.handler.operations.
  AddMediationHandlerOperation.doExecute(Unknown Source)
  at org.eclipse.wst.common.componentcore.internal.operation.
  ArtifactEditProviderOperation.execute(Unknown Source)
  

Problem conclusion

• The NullPointerException was happening due to the way that the
  underlying JEM functionality was introspecting the mediation
  handler class - it was unable to find certain proprety types
  and caused the NullPointerException.  The fix for this APAR is
  currently scheduled for inclusion in the Rational Application
  Developer v7.0.0.7 and WebSphere Application Server Toolkit
  v6.1.1.7 fixpacks.  Please refer to the Recommended Updates
  page for WebSphere Application Server Toolkit delivery
  information:
  http://www.ibm.com/support/docview.wss?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

  WEBAPP SERVER A

• Fixed component ID

  5724J0820

Applicable component levels

• R610 PSY

     UP