PM93884: OpenJPA MetaDataRepository preload doesn't load JAXB meta data which can result in NullPointerException

7.0.0.31: WebSphere Application Server V7.0 Fix Pack 31
7.0.0.33: WebSphere Application Server V7.0 Fix Pack 33
7.0.0.35: WebSphere Application Server V7.0 Fix Pack 35
7.0.0.37: WebSphere Application Server V7.0 Fix Pack 37
7.0.0.39: WebSphere Application Server V7.0 Fix Pack 39
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
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

• In a Thread concurrency scenario the following
  NullPointerException can occur:
  
  Caused by: java.lang.NullPointerException
  at
  org.apache.openjpa.lib.util.J2DoPrivHelper$56.run(J2DoPrivHelper
  .java:1163)
  at
  org.apache.openjpa.lib.util.J2DoPrivHelper$56.run(J2DoPrivHelper
  .java:1161)
  at
  java.security.AccessController.doPrivileged(AccessController.jav
  a:202)
  at
  org.apache.openjpa.persistence.AnnotationPersistenceXMLMetaDataP
  arser.parseXMLClassAnnotations(AnnotationPersistenceXMLMetaDataP
  arser.java:175)
  at
  org.apache.openjpa.persistence.AnnotationPersistenceXMLMetaDataP
  arser.parse(AnnotationPersistenceXMLMetaDataParser.java:163)
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server V7.0.0.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: OpenJPA MetaDataRepository preload      *
  *                      doesn't load JAXB meta data.            *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The OpenJPA MetaDataRepository preloading doesn't process JAXB
  xml meta data on EntityManagerFactory creation, resulting in a
  condition where multiple threads can conflict with each other.
  AnnotationPersistenceXMLMetaDataParser.parse(..) isn't
  thread-safe and relied on the MetaDataRepository to enforce
  synchronization. After preloading is complete, all locks are
  removed from the MetaDataRepository and in turn
  AnnotationPersistenceXMLMetaDataParser can have some threading
  problems.  The following NullPointerException and exception
  stack occurs in this case:
  Caused by: java.lang.NullPointerException
  at
  org.apache.openjpa.lib.util.J2DoPrivHelper$56.run(J2DoPrivHelper
  .java:1163)
  at
  org.apache.openjpa.lib.util.J2DoPrivHelper$56.run(J2DoPrivHelper
  .java:1161)
  at
  java.security.AccessController.doPrivileged(AccessController.jav
  a:202)
  at
  org.apache.openjpa.persistence.AnnotationPersistenceXMLMetaDataP
  arser.parseXMLClassAnnotations(AnnotationPersistenceXMLMetaDataP
  arser.java:175)
  at
  org.apache.openjpa.persistence.AnnotationPersistenceXMLMetaDataP
  arser.parse(AnnotationPersistenceXMLMetaDataParser.java:163)
  at
  org.apache.openjpa.persistence.PersistenceMetaDataFactory.loadXM
  LMetaData(PersistenceMetaDataFactory.java:579)
  at
  org.apache.openjpa.meta.MetaDataRepository.getXMLMetaDataInterna
  l(MetaDataRepository.java:2376)
  at
  org.apache.openjpa.meta.MetaDataRepository.getXMLMetaData(MetaDa
  taRepository.java:2364)
  at
  org.apache.openjpa.kernel.exps.AbstractExpressionBuilder.travers
  ePath(AbstractExpressionBuilder.java:315)
  at
  org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getPath(JPQ
  LExpressionBuilder.java:1941)
  at
  org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getPathOrCo
  nstant(JPQLExpressionBuilder.java:1861)
  at
  org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.eval(JPQLEx
  pressionBuilder.java:1169)
  at
  org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getValue(JP
  QLExpressionBuilder.java:2054)
  at
  org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getValue(JP
  QLExpressionBuilder.java:2040)
  at
  org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.eval(JPQLEx
  pressionBuilder.java:1055)
  at
  org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getExpressi
  on(JPQLExpressionBuilder.java:1970)
  at
  org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.eval(JPQLEx
  pressionBuilder.java:997)
  at
  org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.evalWhereCl
  ause(JPQLExpressionBuilder.java:668)
  at
  org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder.getQueryExp
  ressions(JPQLExpressionBuilder.java:297)
  at
  org.apache.openjpa.kernel.jpql.JPQLParser.eval(JPQLParser.java:6
  7)
  

Problem conclusion

• With this fix, code has been added to OpenJPA to properly
  synchronize access to the OpenJPA MetaDataRepository to avoid
  thread conflicts when processing JAXB xml meta data.
  
  The fix for this APAR is currently targeted for
  inclusion in Service Level (Fix Pack) 7.0.0.31 of WebSphere
  Application Server version 7.0.0.
  
  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

• R700 PSY

     UP