<entity class="org.jbpm.task.Task" metadata-complete="false">            <attributes>             <id name="id">                 <column name="id" />                 <generated-value strategy="IDENTITY "/>                                         </id>           </attributes>       </entity>

14:31:34,615 ERROR [org.jbpm.task.service.TaskServerHandler] (Thread-70) Operation failed: java.lang.RuntimeException: Operation failed           at org.jbpm.task.service.TaskServiceSession.doOperationInTransaction(TaskServiceSession.java:994) [jbpm-human-task-core-5.3.0.Final.jar:5.3.0.Final]           at org.jbpm.task.service.TaskServiceSession.addTask(TaskServiceSession.java:186) [jbpm-human-task-core-5.3.0.Final.jar:5.3.0.Final]           at org.jbpm.task.service.TaskServerHandler.messageReceived(TaskServerHandler.java:144) [jbpm-human-task-core-5.3.0.Final.jar:5.3.0.Final]           at org.jbpm.task.service.hornetq.HornetQTaskServerHandler.messageReceived(HornetQTaskServerHandler.java:44) [jbpm-human-task-hornetq-5.3.0.Final.jar:5.3.0.Final]           at org.jbpm.task.service.hornetq.BaseHornetQTaskServer.run(BaseHornetQTaskServer.java:85) [jbpm-human-task-hornetq-5.3.0.Final.jar:5.3.0.Final]           at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_07] Caused by: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Field 'id' doesn't have a default value           at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1361) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1289) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1295) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:859) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           at org.jbpm.task.service.persistence.TaskPersistenceManager.saveEntity(TaskPersistenceManager.java:186) [jbpm-human-task-core-5.3.0.Final.jar:5.3.0.Final]           at org.jbpm.task.service.TaskServiceSession$1.doOperation(TaskServiceSession.java:188) [jbpm-human-task-core-5.3.0.Final.jar:5.3.0.Final]           at org.jbpm.task.service.TaskServiceSession.doOperationInTransaction(TaskServiceSession.java:979) [jbpm-human-task-core-5.3.0.Final.jar:5.3.0.Final]           ... 5 more Caused by: org.hibernate.exception.GenericJDBCException: Field 'id' doesn't have a default value           at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:52) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:125) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:110) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHandler.java:129) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.jdbc.internal.proxy.AbstractProxyHandler.invoke(AbstractProxyHandler.java:81) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at $Proxy38.executeUpdate(Unknown Source)          at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:96) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:55) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2757) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3268) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:78) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:272) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:304) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:195) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:128) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.ejb.event.EJB3PersistEventListener.saveWithGeneratedId(EJB3PersistEventListener.java:78) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:208) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:151) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:717) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:710) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.spi.EJB3CascadingAction$1.cascade(EJB3CascadingAction.java:49) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:380) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:323) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:208) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.internal.Cascade.cascadeCollectionElements(Cascade.java:409) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.internal.Cascade.cascadeCollection(Cascade.java:350) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:326) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:208) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:165) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:462) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:337) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:195) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:128) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.ejb.event.EJB3PersistEventListener.saveWithGeneratedId(EJB3PersistEventListener.java:78) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:208) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:151) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:78) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:725) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:701) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:705) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:853) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]           ... 8 more Caused by: java.sql.SQLException: Field 'id' doesn't have a default value           at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)           at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609)           at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541)           at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002)           at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163)           at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2624)           at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2127)           at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2427)           at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2345)           at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2330)           at org.jboss.jca.adapters.jdbc.WrappedPreparedStatement.executeUpdate(WrappedPreparedStatement.java:493)           at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source) [:1.7.0_07]           at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_07]           at java.lang.reflect.Method.invoke(Method.java:601) [rt.jar:1.7.0_07]           at org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHandler.java:122) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]           ... 45 more 14:31:34,654 ERROR [org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler] (http--127.0.0.1-8080-3) Fri Oct 26 14:31:34 CEST 2012: Error when creating task on task server for work item id 1. Error reported by task server: Command AddTaskRequest faild due to Operation failed. Please contact task server administrator.: java.lang.RuntimeException: Command AddTaskRequest faild due to Operation failed. Please contact task server administrator.           at org.jbpm.task.service.TaskServerHandler.messageReceived(TaskServerHandler.java:662) [jbpm-human-task-core-5.3.0.Final.jar:5.3.0.Final]           at org.jbpm.task.service.hornetq.HornetQTaskServerHandler.messageReceived(HornetQTaskServerHandler.java:44) [jbpm-human-task-hornetq-5.3.0.Final.jar:5.3.0.Final]           at org.jbpm.task.service.hornetq.BaseHornetQTaskServer.run(BaseHornetQTaskServer.java:85) [jbpm-human-task-hornetq-5.3.0.Final.jar:5.3.0.Final]           at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_07]