EmptyStackException with multi-instance task & CDI

naag — Mon, 13 Aug 2012 03:08:01 GMT

Hi all,I've just run into an EmptyStackException with Activiti 5.10. I've got an multi-instance user task where each task is finished via BusinessProcess.completeTask(). After finishing the last task instance, Activiti calls the end listeners in MultiInstanceActivityBehavior.callActivityEndListeners

Re: EmptyStackException with multi-instance task & CDI

naag — Mon, 13 Aug 2012 04:29:04 GMT

I'm adding a unit test that runs with Arquillian. There are two test classes, one uses activiti.cfg.xml with CdiExecutionListener, and one does not. Hopefully this can help, I can also create a JIRA if you think it's a bug and not API misuse 🙂

Re: EmptyStackException with multi-instance task & CDI

bernd_ruecker — Tue, 14 Aug 2012 05:11:18 GMT

Hi Naag.
Thanks, I will try to have a look into this later today. Posting the stacktrace is also a good idea by the way, but an arquillian test is nice as well.
Cheers
Bernd

Re: EmptyStackException with multi-instance task & CDI

naag — Tue, 14 Aug 2012 06:17:50 GMT

Great support as usual 😄 Here comes the stacktrace from the test execution:


——————————————————————————-
Test set: foo.WithCdiExecutionListenerTest
——————————————————————————-
Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 33.484 sec <<< FAILURE!
testMultiInstanceTask(foo.WithCdiExecutionListenerTest)  Time elapsed: 2.631 sec  <<< ERROR!
org.activiti.engine.ActivitiException: Couldn't execute end listener
 at org.activiti.engine.impl.bpmn.behavior.MultiInstanceActivityBehavior.callActivityEndListeners(MultiInstanceActivityBehavior.java:239)
 at org.activiti.engine.impl.bpmn.behavior.SequentialMultiInstanceBehavior.leave(SequentialMultiInstanceBehavior.java:58)
 at org.activiti.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior.leave(AbstractBpmnActivityBehavior.java:49)
 at org.activiti.engine.impl.bpmn.behavior.UserTaskActivityBehavior.signal(UserTaskActivityBehavior.java:92)
 at org.activiti.engine.impl.bpmn.behavior.MultiInstanceActivityBehavior.signal(MultiInstanceActivityBehavior.java:101)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.signal(ExecutionEntity.java:364)
 at org.activiti.engine.impl.persistence.entity.TaskEntity.complete(TaskEntity.java:156)
 at org.activiti.engine.impl.cmd.CompleteTaskCmd.completeTask(CompleteTaskCmd.java:63)
 at org.activiti.engine.impl.cmd.CompleteTaskCmd.execute(CompleteTaskCmd.java:57)
 at org.activiti.engine.impl.cmd.CompleteTaskCmd.execute(CompleteTaskCmd.java:28)
 at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
 at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:42)
 at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
 at org.activiti.engine.impl.TaskServiceImpl.complete(TaskServiceImpl.java:144)
 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:597)
 at org.jboss.weld.bean.proxy.AbstractBeanInstance.invoke(AbstractBeanInstance.java:44)
 at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:105)
 at org.jboss.weld.proxies.TaskService$-663006443$Proxy$_$$_WeldClientProxy.complete(TaskService$-663006443$Proxy$_$$_WeldClientProxy.java)
 at foo.WithCdiExecutionListenerTest.testMultiInstanceTask(WithCdiExecutionListenerTest.java:81)
 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:597)
 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
 at org.jboss.arquillian.junit.Arquillian$6$1.invoke(Arquillian.java:270)
 at org.jboss.arquillian.container.test.impl.execution.LocalTestExecuter.execute(LocalTestExecuter.java:60)
 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:597)
 at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
 at org.jboss.arquillian.core.impl.EventContextImpl.invokeObservers(EventContextImpl.java:99)
 at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:81)
 at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:135)
 at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:115)
 at org.jboss.arquillian.core.impl.EventImpl.fire(EventImpl.java:67)
 at org.jboss.arquillian.container.test.impl.execution.ContainerTestExecuter.execute(ContainerTestExecuter.java:38)
 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:597)
 at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
 at org.jboss.arquillian.core.impl.EventContextImpl.invokeObservers(EventContextImpl.java:99)
 at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:81)
 at org.jboss.arquillian.test.impl.TestContextHandler.createTestContext(TestContextHandler.java:89)
 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:597)
 at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
 at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
 at org.jboss.arquillian.test.impl.TestContextHandler.createClassContext(TestContextHandler.java:75)
 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:597)
 at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
 at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
 at org.jboss.arquillian.test.impl.TestContextHandler.createSuiteContext(TestContextHandler.java:60)
 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:597)
 at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94)
 at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
 at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:135)
 at org.jboss.arquillian.test.impl.EventTestRunnerAdaptor.test(EventTestRunnerAdaptor.java:111)
 at org.jboss.arquillian.junit.Arquillian$6.evaluate(Arquillian.java:263)
 at org.jboss.arquillian.junit.Arquillian$4.evaluate(Arquillian.java:226)
 at org.jboss.arquillian.junit.Arquillian.multiExecute(Arquillian.java:314)
 at org.jboss.arquillian.junit.Arquillian.access$100(Arquillian.java:46)
 at org.jboss.arquillian.junit.Arquillian$5.evaluate(Arquillian.java:240)
 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
 at org.jboss.arquillian.junit.Arquillian$2.evaluate(Arquillian.java:185)
 at org.jboss.arquillian.junit.Arquillian.multiExecute(Arquillian.java:314)
 at org.jboss.arquillian.junit.Arquillian.access$100(Arquillian.java:46)
 at org.jboss.arquillian.junit.Arquillian$3.evaluate(Arquillian.java:199)
 at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
 at org.jboss.arquillian.junit.Arquillian.run(Arquillian.java:147)
 at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
 at org.junit.runner.JUnitCore.run(JUnitCore.java:136)
 at org.jboss.arquillian.junit.container.JUnitTestRunner.execute(JUnitTestRunner.java:65)
 at org.jboss.arquillian.protocol.jmx.JMXTestRunner.runTestMethodInternal(JMXTestRunner.java:129)
 at org.jboss.arquillian.protocol.jmx.JMXTestRunner.runTestMethod(JMXTestRunner.java:108)
 at org.jboss.as.arquillian.service.ArquillianService$ExtendedJMXTestRunner.runTestMethod(ArquillianService.java:226)
 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:597)
 at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:93)
 at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:27)
 at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:208)
 at com.sun.jmx.mbeanserver.PerInterface.invoke(PerInterface.java:120)
 at com.sun.jmx.mbeanserver.MBeanSupport.invoke(MBeanSupport.java:262)
 at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836)
 at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761)
 at org.jboss.as.jmx.PluggableMBeanServerImpl$TcclMBeanServer.invoke(PluggableMBeanServerImpl.java:498)
 at org.jboss.as.jmx.PluggableMBeanServerImpl.invoke(PluggableMBeanServerImpl.java:246)
 at org.jboss.remotingjmx.protocol.v1.ServerProxy$InvokeHandler.handle(ServerProxy.java:1034)
 at org.jboss.remotingjmx.protocol.v1.ServerProxy$MessageReciever$1.run(ServerProxy.java:215)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 at java.lang.Thread.run(Thread.java:662)
Caused by: java.util.EmptyStackException
 at java.util.Stack.peek(Stack.java:85)
 at org.activiti.engine.impl.context.Context.getExecutionContext(Context.java:68)
 at org.activiti.cdi.impl.event.CdiExecutionListener.createEvent(CdiExecutionListener.java:77)
 at org.activiti.cdi.impl.event.CdiExecutionListener.notify(CdiExecutionListener.java:71)
 at org.activiti.engine.impl.delegate.ExecutionListenerInvocation.invoke(ExecutionListenerInvocation.java:34)
 at org.activiti.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:37)
 at org.activiti.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:25)
 at org.activiti.engine.impl.bpmn.behavior.MultiInstanceActivityBehavior.callActivityEndListeners(MultiInstanceActivityBehavior.java:235)
 … 114 more

Re: EmptyStackException with multi-instance task & CDI

bernd_ruecker — Tue, 14 Aug 2012 13:11:25 GMT

Hi Peter.

I can actually confirm this issue, this is a bug. It is actually not related to CDI but to the engine for MultipleInstance's. I created this JIRA issue: http://jira.codehaus.org/browse/ACT-1339. Thanks for the perfect bug report!

Cheers
Bernd

Re: EmptyStackException with multi-instance task & CDI

bernd_ruecker — Tue, 14 Aug 2012 13:12:23 GMT

P.S: If it is really urgent for you you could think about a support subscription and we could fix it for you in 6.1 😉 Otherwise I would propose to extend the CdiEventListener and check for the empty stack and not send the event in that case if possible for your use case.

Re: EmptyStackException with multi-instance task & CDI

naag — Tue, 14 Aug 2012 16:26:11 GMT

Thanks for creating the JIRA and the support offer 🙂 Actually we're not yet using CDI events, but we still had the CdiExecutionListener in place. So for now we removed it and everything's fine!

Re: EmptyStackException with multi-instance task & CDI

bernd_ruecker — Tue, 14 Aug 2012 16:48:49 GMT

Perfect. Would not be a show stopper for not providing support for us 😉

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