Tun Mang [http://community.jboss.org/people/tunmang] replied to the discussion "jBPM 4.3 starting a sub-process after a state node will fail" To view the discussion, visit: http://community.jboss.org/message/534973#534973 -------------------------------------------------------------- Hi Maciej : Thanks for your help. The event listener is just for my own transition visibility. After I removed all the event listeners in the process definition (as shown below), re-deploy, re-start the process instance. When the "token" reached the state node, I call executionService.signalExecutionById("SimSubProc.290001"), and it throws the same exceptions. I get the executionService by calling processEngine.getExecutionService(). Is there something I missed ? The puzzle I cannot figure out is why if I remove the "check_id" state node and make the start node's transition directly go to the sub-process, everything goes fine. Thanks a lot for your help again. Tun Mang ================================= <?xml version="1.0" encoding="UTF-8"?> <process name="SimSubProc" xmlns=" http://jbpm.org/4.3/jpdl http://jbpm.org/4.3/jpdl">   <start >      <transition to="check_id" ></transition>      </start>   <state name="check_id"  >        <transition to="review" ></transition>        </state>   <sub-process name="review" sub-process-key="SubProcTasks" >                   <transition to="ok" ></transition>      </sub-process>     <state name="ok" >        <transition to="end" ></transition>              </state>    <end name="end" ></end>  </process> =================================== 09:03:17,937 INF | [CheckDbCmd] jBPM version info: library[4.3], schema[4.3] Process Engine Identity Hash Code: 4781685 09:03:18,765 WRN | [JDBCExceptionReporter] SQL Error: 1452, SQLState: 23000 09:03:18,765 SEV | [JDBCExceptionReporter] Cannot add or update a child row: a foreign key constraint fails (`jbpm_4_3/jbpm4_execution`, CONSTRAINT `FK_EXEC_SUBPI` FOREIGN KEY (`SUBPROCINST_`) REFERENCES `jbpm4_execution` (`DBID_`)) ### EXCEPTION ########################################### 09:03:18,765 SEV | [AbstractFlushingEventListener] Could not synchronize database state with session org.hibernate.exception.ConstraintViolationException: could not update: [org.jbpm.pvm.internal.model.ExecutionImpl#290001] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2425)   .... at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) at org.jbpm.pvm.internal.id.AcquireDbidBlockCmd.execute(AcquireDbidBlockCmd.java:35) at org.jbpm.pvm.internal.id.AcquireDbidBlockCmd.execute(AcquireDbidBlockCmd.java:10) at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42) .... at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.signalExecutionById(ExecutionServiceImpl.java:84) ... 37 more ### EXCEPTION ########################################### ### EXCEPTION ########################################### 09:03:18,781 INF | [DefaultCommandService] exception while executing command org.jbpm.pvm.internal.cmd.SignalCmd@c017e9 org.jbpm.api.JbpmException: couldn't acquire block of ids at org.jbpm.pvm.internal.id.DatabaseDbidGenerator.getNextId(DatabaseDbidGenerator.java:65) at org.jbpm.pvm.internal.model.ExecutionImpl.save(ExecutionImpl.java:194) at org.jbpm.pvm.internal.model.ExecutionImpl.initializeProcessInstance(ExecutionImpl.java:187) at org.jbpm.pvm.internal.model.ProcessDefinitionImpl.createProcessInstance(ProcessDefinitionImpl.java:106) at org.jbpm.jpdl.internal.activity.SubProcessActivity.execute(SubProcessActivity.java:70) at org.jbpm.pvm.internal.model.op.ExecuteActivity.perform(ExecuteActivity.java:60) at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(ExecutionImpl.java:656) at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(ExecutionImpl.java:616) at org.jbpm.pvm.internal.model.ExecutionImpl.signal(ExecutionImpl.java:417) at org.jbpm.pvm.internal.cmd.SignalCmd.execute(SignalCmd.java:61) at org.jbpm.pvm.internal.cmd.SignalCmd.execute(SignalCmd.java:35) at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42) at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:54) at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.executeInNewEnvironment(EnvironmentInterceptor.java:53) at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:40) at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55) at org.jbpm.pvm.internal.svc.SkipInterceptor.execute(SkipInterceptor.java:43) at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.signalExecutionById(ExecutionServiceImpl.java:84) .... -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/534973#534973] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]