1 Reply Latest reply on Jan 12, 2005 5:52 PM by bsaravan

    JDBCLoadRelationCommand producing NullPointerException

    bsaravan
    bsaravan Jan 12, 2005 5:34 PM

      Hi,

      My application works under JBoss 3.2.1 but fails under JBoss 4.0. I receive the following error:

      2005-01-11 17:59:31,078 DEBUG [org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadRelationCommand.MediaEJB] load relation SQL: SELECT media_id, id FROM audio with (xlock) WHERE (media_id=?) OR (media_id=?)
2005-01-11 17:59:31,078 ERROR [org.jboss.ejb.plugins.LogInterceptor] TransactionRolledbackLocalException in method: public abstract void com.harris.has.content.ejb.MediaEJB.update(com.harris.has.model.content.Media), causedBy:
java.lang.NullPointerException
 at org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadRelationCommand.execute(JDBCLoadRelationCommand.java:147)
 at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.loadRelation(JDBCStoreManager.java:695)
 at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.load(JDBCCMRFieldBridge.java:1295)
 at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.getInstanceValue(JDBCCMRFieldBridge.java:649)
 at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.getValue(JDBCCMRFieldBridge.java:602)
 at org.jboss.ejb.plugins.cmp.bridge.EntityBridgeInvocationHandler$FieldGetInvoker.invoke(EntityBridgeInvocationHandler.java:133)
 at org.jboss.ejb.plugins.cmp.bridge.EntityBridgeInvocationHandler.invoke(EntityBridgeInvocationHandler.java:91)
 at org.jboss.proxy.compiler.Runtime.invoke(Runtime.java:62)
 at com.harris.has.content.ejb.MediaEJBBean$Proxy.getAudioEJB(<generated>)
 at com.harris.has.content.ejb.MediaEJBBean.update(MediaEJBBean.java:233)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
........



      Here is the relationship between MediaEJB and AudioEJB. 

       <ejb-relation>
 <ejb-relation-name>mediaEJB-audioEJB</ejb-relation-name>
 <ejb-relationship-role>
 <description>mediaEJB</description>
 <ejb-relationship-role-name>MediaEJBRelationshipRole</ejb-relationship-role-name>
 <multiplicity>One</multiplicity>
 <relationship-role-source>
 <description>mediaEJB</description>
 <ejb-name>MediaEJB</ejb-name>
 </relationship-role-source>
 <cmr-field>
 <description>audioEJB</description>
 <cmr-field-name>audioEJB</cmr-field-name>
 </cmr-field>
 </ejb-relationship-role>
 <ejb-relationship-role>
 <description>audioEJB</description>
 <ejb-relationship-role-name>AudioEJBRelationshipRole</ejb-relationship-role-name>
 <multiplicity>One</multiplicity>
 <cascade-delete />
 <relationship-role-source>
 <description>audioEJB</description>
 <ejb-name>AudioEJB</ejb-name>
 </relationship-role-source>
 <cmr-field>
 <description>mediaEJB</description>
 <cmr-field-name>mediaEJB</cmr-field-name>
 </cmr-field>
 </ejb-relationship-role>
 </ejb-relation>


      Any ideas on what the problem could be?

      Thanks,
      Bala

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