PM28563: WEBSPHERE REGISTERS ITS "JIT STUB" PLUGIN WITH MODULE CLASS LOADERS HAS A FLAW IN ITS LOGIC.

7.0.0.17: Java SDK 1.6 SR9 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.27: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.19: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.21: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere
7.0.0.23: Java SDK 1.6 SR10 FP1 Cumulative Fix for WebSphere
7.0.0.25: Java SDK 1.6 SR11 Cumulative Fix for WebSphere Application Server
7.0.0.27: Java SDK 1.6 SR12 Cumulative Fix for WebSphere Application Server
7.0.0.29: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.45: Java SDK 1.6 SR16 FP60 Cumulative Fix for WebSphere Application Server
7.0.0.31: Java SDK 1.6 SR15 Cumulative Fix for WebSphere Application Server
7.0.0.35: Java SDK 1.6 SR16 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.37: Java SDK 1.6 SR16 FP3 Cumulative Fix for WebSphere Application Server
7.0.0.39: Java SDK 1.6 SR16 FP7 Cumulative Fix for WebSphere Application Server
7.0.0.41: Java SDK 1.6 SR16 FP20 Cumulative Fix for WebSphere Application Server
7.0.0.43: Java SDK 1.6 SR16 FP41 Cumulative Fix for WebSphere Application Server

APAR status

• Closed as program error.

Error description

• [12/1/10 00:00:00:000 CST] 00000000 annotation    E
  com.ibm.ws.webcontainer.annotation.WASAnnotationHelper inject
  exception while injecting resource --> [InjectionTargetField=
  com.ibm.test._TestEJB_Stub]
  com.ibm.wsspi.injectionengine.InjectionException: The
  com.ibm.ws.naming.util.IndirectJndiLookupObjectFactory factory
  encountered a problem getting the object instance for the
  Reference:com.ibm.test.TestEJB binding object.
  ...
  Caused by: java.lang.ClassCastException: Unable to load class:
  com.ibm.test._TestEJB_Stub
  at com.ibm.rmi.javax.rmi.PortableRemoteObject.narrow(
  PortableRemoteObject.java:378)
  at javax.rmi.PortableRemoteObject.narrow(
  PortableRemoteObject.java:137)
  at com.ibm.ws.injectionengine.processor.EJBInjectionBinding.
  narrow(EJBInjectionBinding.java:992)
  at com.ibm.ws.injectionengine.processor.EJBInjectionBinding.
  getInjectionObject(EJBInjectionBinding.java:806)
  

Local fix

• Candidate to be fixed in next release.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server V7.0 users *
  *                  of EJB 3.0.                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: Injection or lookup of remote EJBs      *
  *                      can fail if the client application      *
  *                      contains WAR modules and EJB client     *
  *                      JAR files only.                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The product registers a plugin with module class loaders in
  order to generate missing stub classes automatically.  If an
  application only contains WAR modules, then the WAR module
  class loaders will have the stub plugin, but the application
  class loader will not.  In general, EJB client JAR files are
  placed on the class path of the application class loader.
  
  When injecting EJB references, the injection engine is
  required to narrow remote EJB stubs to match the field or
  method type.  Before performing this narrow, the context class
  loader is changed to the class loader of the interface class.
  If the interface class is from the application class loader
  and the application class loader does not have the stub
  plugin, then the narrow fails.
  
  When the application is packaged as described above, the
  narrow performed by the EJBInjectionBinding class will fail
  reliably with a stack trace similar to the one in the error
  description.  This fix for this APAR will only resolve that
  specific problem exception; it is not a general fix for
  ClassCastExceptions thrown by PortableRemoteObject.narrow.
  

Problem conclusion

• The injection engine is updated to set the context class
  loader to the module class loader before perfoming the narrow.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 7.0.0.17.  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

  WEBSPHERE APP S

• Fixed component ID

  5724J0800

Applicable component levels

• R61A PSY

     UP

• R61H PSY

     UP

• R61I PSY

     UP

• R61P PSY

     UP

• R61S PSY

     UP

• R61W PSY

     UP

• R61Z PSY

     UP

• R700 PSY

     UP