How to catch exception when deleting?
bfo81 Aug 2, 2006 12:41 PMI have a Stateful Session Bean with a method delete(). Guess what is does? It deletes an entity ;).
@Stateful @Scope(Scopetype.SESSION) @name("foo") ... @In(create=true) private EntityManager em; public String delete() { em.remove(anEntity); return "finished"; }
Ok, now it could be that the user wants to delete an entity that is referenced by other entities. So an SqlException is thrown telling that a database constraint is violated. I wanted to catch that exception and tell the user that deletion wasn't successful. I tried it like this:
public String delete() { try { em.remove(anEntitiy); } catch (Exception ex) { ...addMessage("Deletion failed!"); } return "finished"; }
Unfortunately that doesn't work, the exception isn't caught and Facelets displays an ugly error message.
Well... why? *g*
Here's the log. It's long but please don't be shocked ;).
2006-08-02 18:25:38,359 DEBUG [org.hibernate.jdbc.AbstractBatcher] about to open PreparedStatement (open PreparedStatements: 0, globally: 0) 2006-08-02 18:25:38,359 DEBUG [org.hibernate.SQL] delete from Person where id=? and version=? 2006-08-02 18:25:38,359 INFO [STDOUT] Hibernate: delete from Person where id=? and version=? 2006-08-02 18:25:38,375 DEBUG [org.hibernate.jdbc.AbstractBatcher] about to close PreparedStatement (open PreparedStatements: 1, globally: 1) 2006-08-02 18:25:38,375 DEBUG [org.hibernate.jdbc.ConnectionManager] skipping aggressive-release due to flush cycle 2006-08-02 18:25:38,375 DEBUG [org.hibernate.util.JDBCExceptionReporter] could not delete: [de.beffo.test.model.Person#9] [delete from Person where id=? and version=?] java.sql.SQLException: Cannot delete or update a parent row: a foreign key constraint fails (`test/person_person`, CONSTRAINT `FKB9039F7F77F35DCE` FOREIGN KEY (`freunde_id`) REFERENCES `person` (`id`)) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2928) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1571) at com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1124) at com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:676) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1166) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1082) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1067) at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.executeUpdate(WrappedPreparedStatement.java:251) at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2366) at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2516) at org.hibernate.action.EntityDeleteAction.execute(EntityDeleteAction.java:73) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:232) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:144) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:297) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:993) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:340) at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:475) at org.jboss.tm.TransactionImpl.doBeforeCompletion(TransactionImpl.java:1491) at org.jboss.tm.TransactionImpl.beforePrepare(TransactionImpl.java:1110) at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:324) at org.jboss.tm.TxManager.commit(TxManager.java:240) at org.jboss.aspects.tx.TxPolicy.endTransaction(TxPolicy.java:175) at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:87) at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:197) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:81) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:188) at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98) at $Proxy112.loeschen(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at com.sun.el.parser.AstValue.invoke(AstValue.java:151) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:283) at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68) at com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:69) at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:63) at javax.faces.component.UICommand.broadcast(UICommand.java:106) at javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:90) at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:132) at org.apache.myfaces.lifecycle.LifecycleImpl.applyRequestValues(LifecycleImpl.java:200) at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:71) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:106) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:30) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) at java.lang.Thread.run(Thread.java:595) 2006-08-02 18:25:38,375 WARN [org.hibernate.util.JDBCExceptionReporter] SQL Error: 1451, SQLState: 23000 2006-08-02 18:25:38,375 ERROR [org.hibernate.util.JDBCExceptionReporter] Cannot delete or update a parent row: a foreign key constraint fails (`test/person_person`, CONSTRAINT `FKB9039F7F77F35DCE` FOREIGN KEY (`freunde_id`) REFERENCES `person` (`id`)) 2006-08-02 18:25:38,375 ERROR [org.hibernate.event.def.AbstractFlushingEventListener] Could not synchronize database state with session org.hibernate.exception.ConstraintViolationException: could not delete: [de.beffo.test.model.Person#9] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2384) at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2516) at org.hibernate.action.EntityDeleteAction.execute(EntityDeleteAction.java:73) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:232) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:144) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:297) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:993) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:340) at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:475) at org.jboss.tm.TransactionImpl.doBeforeCompletion(TransactionImpl.java:1491) at org.jboss.tm.TransactionImpl.beforePrepare(TransactionImpl.java:1110) at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:324) at org.jboss.tm.TxManager.commit(TxManager.java:240) at org.jboss.aspects.tx.TxPolicy.endTransaction(TxPolicy.java:175) at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:87) at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:197) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:81) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:188) at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98) at $Proxy112.loeschen(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at com.sun.el.parser.AstValue.invoke(AstValue.java:151) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:283) at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68) at com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:69) at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:63) at javax.faces.component.UICommand.broadcast(UICommand.java:106) at javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:90) at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:132) at org.apache.myfaces.lifecycle.LifecycleImpl.applyRequestValues(LifecycleImpl.java:200) at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:71) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:106) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:30) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) at java.lang.Thread.run(Thread.java:595) Caused by: java.sql.SQLException: Cannot delete or update a parent row: a foreign key constraint fails (`test/person_person`, CONSTRAINT `FKB9039F7F77F35DCE` FOREIGN KEY (`freunde_id`) REFERENCES `person` (`id`)) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2928) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1571) at com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1124) at com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:676) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1166) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1082) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1067) at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.executeUpdate(WrappedPreparedStatement.java:251) at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2366) ... 67 more 2006-08-02 18:25:38,375 DEBUG [org.hibernate.jdbc.ConnectionManager] aggressively releasing JDBC connection 2006-08-02 18:25:38,375 DEBUG [org.hibernate.jdbc.ConnectionManager] releasing JDBC connection [ (open PreparedStatements: 0, globally: 0) (open ResultSets: 0, globally: 0)] 2006-08-02 18:25:38,421 DEBUG [org.hibernate.jdbc.JDBCContext] TransactionFactory reported no active transaction; Synchronization not registered 2006-08-02 18:25:38,421 DEBUG [org.hibernate.jdbc.JDBCContext] TransactionFactory reported no active transaction; Synchronization not registered 2006-08-02 18:25:38,421 DEBUG [org.hibernate.jdbc.JDBCContext] TransactionFactory reported no active transaction; Synchronization not registered 2006-08-02 18:25:38,421 DEBUG [org.jboss.util.NestedThrowable] org.jboss.util.NestedThrowable.parentTraceEnabled=true 2006-08-02 18:25:38,421 DEBUG [org.jboss.util.NestedThrowable] org.jboss.util.NestedThrowable.nestedTraceEnabled=false 2006-08-02 18:25:38,421 DEBUG [org.jboss.util.NestedThrowable] org.jboss.util.NestedThrowable.detectDuplicateNesting=true 2006-08-02 18:25:38,437 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/test].[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception javax.faces.FacesException: Error calling action method of component with id _id19:_id42 at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:74) at javax.faces.component.UICommand.broadcast(UICommand.java:106) at javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:90) at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:132) at org.apache.myfaces.lifecycle.LifecycleImpl.applyRequestValues(LifecycleImpl.java:200) at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:71) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:106) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:30) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) at java.lang.Thread.run(Thread.java:595) Caused by: javax.faces.el.EvaluationException: /personEditor.xhtml @82,124 action="#{personEditor.loeschen}": java.lang.RuntimeException: org.jboss.tm.JBossRollbackException: Unable to commit, tx=TransactionImpl:XidImpl[FormatId=257, GlobalId=SCHLEPPI/34, BranchQual=, localId=34] status=STATUS_NO_TRANSACTION; - nested throwable: (javax.persistence.EntityExistsException: org.hibernate.exception.ConstraintViolationException: could not delete: [de.beffo.test.model.Person#9]) at com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:73) at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:63) ... 27 more Caused by: java.lang.RuntimeException: org.jboss.tm.JBossRollbackException: Unable to commit, tx=TransactionImpl:XidImpl[FormatId=257, GlobalId=SCHLEPPI/34, BranchQual=, localId=34] status=STATUS_NO_TRANSACTION; - nested throwable: (javax.persistence.EntityExistsException: org.hibernate.exception.ConstraintViolationException: could not delete: [de.beffo.test.model.Person#9]) at org.jboss.aspects.tx.TxPolicy.handleEndTransactionException(TxPolicy.java:198) at org.jboss.aspects.tx.TxPolicy.endTransaction(TxPolicy.java:180) at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:87) at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:197) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:81) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:188) at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98) at $Proxy112.loeschen(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at com.sun.el.parser.AstValue.invoke(AstValue.java:151) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:283) at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68) at com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:69) ... 28 more Caused by: org.jboss.tm.JBossRollbackException: Unable to commit, tx=TransactionImpl:XidImpl[FormatId=257, GlobalId=SCHLEPPI/34, BranchQual=, localId=34] status=STATUS_NO_TRANSACTION; - nested throwable: (javax.persistence.EntityExistsException: org.hibernate.exception.ConstraintViolationException: could not delete: [de.beffo.test.model.Person#9]) at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:372) at org.jboss.tm.TxManager.commit(TxManager.java:240) at org.jboss.aspects.tx.TxPolicy.endTransaction(TxPolicy.java:175) ... 52 more Caused by: javax.persistence.EntityExistsException: org.hibernate.exception.ConstraintViolationException: could not delete: [de.beffo.test.model.Person#9] at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:555) at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:484) at org.jboss.tm.TransactionImpl.doBeforeCompletion(TransactionImpl.java:1491) at org.jboss.tm.TransactionImpl.beforePrepare(TransactionImpl.java:1110) at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:324) ... 54 more Caused by: org.hibernate.exception.ConstraintViolationException: could not delete: [de.beffo.test.model.Person#9] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2384) at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2516) at org.hibernate.action.EntityDeleteAction.execute(EntityDeleteAction.java:73) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:232) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:144) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:297) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:993) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:340) at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:475) ... 57 more Caused by: java.sql.SQLException: Cannot delete or update a parent row: a foreign key constraint fails (`test/person_person`, CONSTRAINT `FKB9039F7F77F35DCE` FOREIGN KEY (`freunde_id`) REFERENCES `person` (`id`)) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2928) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1571) at com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1124) at com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:676) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1166) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1082) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1067) at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.executeUpdate(WrappedPreparedStatement.java:251) at org.hibernate.persister.entity.AbstractEntityPersister.delete(AbstractEntityPersister.java:2366) ... 67 more