PH12669: NULLPOINTEREXCEPTION OCCURS IN EMF DO TO CONCURRENT INITIALIZATION

9.0.5.1: WebSphere Application Server traditional Version 9.0.5 Fix Pack 1
9.0.5.2: WebSphere Application Server traditional Version 9.0.5 Fix Pack 2
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3
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

• Caused by: java.lang.NullPointerException
  
  at
  org.eclipse.emf.ecore.impl.EClassImpl.getEStructuralFeature(ECla
  ssImpl.java:803)
  
  at
  com.ibm.ws.bo.BOModelHolder.getElement(BOModelHolder.java:446)
  
  at
  com.ibm.ws.bo.service.BOTypeImpl.getTypeByElement(BOTypeImpl.jav
  a:103)
  
  at
  com.ibm.ws.bo.delegate.BOTypeDelegate.getTypeByElement(BOTypeDel
  egate.java:55)
  
  at
  com.ibm.ws.sibx.mediation.primitives.headersetter.HeaderTypeSOAP
  .getBOTypeByElementFromQName(HeaderTypeSOAP.java:2422)
  
  at
  com.ibm.ws.sibx.mediation.primitives.headersetter.HeaderTypeSOAP
  .findBOTypes(HeaderTypeSOAP.java:1621)
  
  at
  com.ibm.ws.sibx.mediation.primitives.headersetter.HeaderTypeSOAP
  .validateValues(HeaderTypeSOAP.java:1602)
  
  at
  com.ibm.ws.sibx.mediation.primitives.headersetter.HeaderElement.
  validate(HeaderElement.java:317)
  

Local fix

• n.a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server and using BPM (Business Process      *
  *                  Manager)                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: NullPointerException occurs in EMF      *
  *                      (Eclipse Modeling Framework) during     *
  *                      initialization.                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The following null pointer exception might be encountered when
  running BPM:
  Caused by: java.lang.NullPointerException
  at
  org.eclipse.emf.ecore.impl.EClassImpl.getEStructuralFeature(ECla
  ssImpl.java:803)
  at
  com.ibm.ws.bo.BOModelHolder.getElement(BOModelHolder.java:446)
  at
  com.ibm.ws.bo.service.BOTypeImpl.getTypeByElement(BOTypeImpl.jav
  a:103)
  at
  com.ibm.ws.bo.delegate.BOTypeDelegate.getTypeByElement(BOTypeDel
  egate.java:55)
  at
  com.ibm.ws.sibx.mediation.primitives.headersetter.HeaderTypeSOAP
  .getBOTypeByElementFromQName(HeaderTypeSOAP.java:2422)
  at
  com.ibm.ws.sibx.mediation.primitives.headersetter.HeaderTypeSOAP
  .findBOTypes(HeaderTypeSOAP.java:1621)
  at
  com.ibm.ws.sibx.mediation.primitives.headersetter.HeaderTypeSOAP
  .validateValues(HeaderTypeSOAP.java:1602)
  at
  com.ibm.ws.sibx.mediation.primitives.headersetter.HeaderElement.
  validate(HeaderElement.java:317)
  The EMF code is not thread-safe.  The proper way to use EMF is
  to do all model initialization using a single thread.  After
  initialization, multi-threaded access can be used.
  We suspect that BPM code is modifying the model after
  initialization is complete.  This is difficult to prove since
  the problem could not be produced when debug code was active.
  

Problem conclusion

• Double-check locking was added to EMF to provide a small
  measure of thread-safety.  This protects the area of EMF
  code where this particular NullPointerException is thrown.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.5.5.16 and 9.0.5.1.  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

• R900 PSY

     UP