Well, if you look at the stack trace, the reason is very clear: Caused by: java.lang.RuntimeException: org.jboss.tm.JBossRollbackException: Unable to commit, tx=TransactionImpl:XidImpl[FormatId=257, GlobalId=gavin-kings-computer.local/117, BranchQual=, localId=117] status=STATUS_NO_TRANSACTION; - nested throwable: (javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Could not execute JDBC batch update) | 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:191) | 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:83) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77) | at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:102) | 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:203) | at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:98) | at $Proxy113.removeHotel(Unknown Source) | at org.jboss.seam.example.booking.HotelBooking$$FastClassByCGLIB$$c83b792d.invoke(<generated>) | at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149) | at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:45) | at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:74) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:55) | at org.jboss.seam.example.booking.LoggedInInterceptor.checkLoggedIn(LoggedInInterceptor.java:25) | at sun.reflect.GeneratedMethodAccessor133.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:585) | at org.jboss.seam.util.Reflections.invoke(Reflections.java:18) | at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64) | at org.jboss.seam.interceptors.RemoveInterceptor.removeIfNecessary(RemoveInterceptor.java:40) | at sun.reflect.GeneratedMethodAccessor126.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:585) | at org.jboss.seam.util.Reflections.invoke(Reflections.java:18) | at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64) | at org.jboss.seam.interceptors.ExceptionInterceptor.handleExceptions(ExceptionInterceptor.java:39) | at sun.reflect.GeneratedMethodAccessor125.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:585) | at org.jboss.seam.util.Reflections.invoke(Reflections.java:18) | at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64) | at org.jboss.seam.intercept.RootInterceptor.createSeamInvocationContext(RootInterceptor.java:144) | at org.jboss.seam.intercept.RootInterceptor.invokeInContexts(RootInterceptor.java:129) | at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:102) | at org.jboss.seam.intercept.ClientSideInterceptor.interceptInvocation(ClientSideInterceptor.java:83) | at org.jboss.seam.intercept.ClientSideInterceptor.intercept(ClientSideInterceptor.java:52) | at org.jboss.seam.intercept.Proxy$$EnhancerByCGLIB$$3bf45ed2.removeHotel(<generated>) | 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 org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:129) | ... 40 more | Caused by: org.jboss.tm.JBossRollbackException: Unable to commit, tx=TransactionImpl:XidImpl[FormatId=257, GlobalId=gavin-kings-computer.local/117, BranchQual=, localId=117] status=STATUS_NO_TRANSACTION; - nested throwable: (javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Could not execute JDBC batch update) | 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) | ... 94 more | Caused by: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Could not execute JDBC batch update | at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:647) | at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:524) | 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) | ... 96 more | Caused by: org.hibernate.exception.GenericJDBCException: Could not execute JDBC batch update | at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103) | at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91) | at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) | at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:249) | at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235) | at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:144) | at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298) | at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) | at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) | at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338) | at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:515) | ... 99 more | Caused by: java.sql.BatchUpdateException: failed batch | at org.hsqldb.jdbc.jdbcStatement.executeBatch(Unknown Source) | at org.hsqldb.jdbc.jdbcPreparedStatement.executeBatch(Unknown Source) | at org.jboss.resource.adapter.jdbc.WrappedStatement.executeBatch(WrappedStatement.java:519) | at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48) | at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242) | ... 106 more The exception occurs at transaction commit (flush) time, which means that you get whatever exception the JBoss EJB3 container throws. In this case, it throws a RuntimeException. (I'm not quite sure if I approve of that, but you can take that up with the EJB3 guys in the EJB3 forum.) if you do an explicit flush() in your remove method, the exception will be handled as you expect. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4009725#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...