can not start process instance without any exceptions

[wenweikun]

Hi~I have a bean that use for starting my process instance with the process variable, I use activiti 5.12 and activiti-cdi.
the code is quite sample:

   public void startProcess(PurchaseOrder po) {
      System.out.println("————-Process begin————");
      businessProcess.setVariable("po", po);
      System.out.println("————-set process variables done————");
      businessProcess.startProcessByKey("myProcess");
      System.out.println("————-Process started————");
   }

the system out msg use for my debug.

everything is perfect using the following bpmn:

<process id="myProcess" name="My process" isExecutable="true">
    <startEvent id="startevent1" name="Start"></startEvent>
    <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow>
    <userTask id="usertask1" name="User Task"></userTask>
    <sequenceFlow id="flow2" sourceRef="servicetask1" targetRef="usertask2"></sequenceFlow>
    <userTask id="usertask2" name="User Task"></userTask>
    <endEvent id="endevent1" name="End"></endEvent>
    <sequenceFlow id="flow3" sourceRef="usertask2" targetRef="endevent1"></sequenceFlow>
  </process>

but when i change the "usertask1" to a email task, the process instance was not deployed. the system out msg remain in —set process variables done—– but not —-Process started—— and also , there is no exceptions.

the email task is also not special :  <serviceTask id="mailtask1" name="Send email if received" activiti:type="mail">

I go on debug.


I set the email task as Asynchronous, the process instance will work, but seems the mail did not sent out successfully

and if I change the email task to a service task, it is no problem.

my engine configuration:

public ProcessEngine getProcessEngine() {
      CdiJtaProcessEngineConfiguration processEngineConfiguration = new CdiJtaProcessEngineConfiguration();
      processEngineConfiguration.setProcessEngineName("default");
      processEngineConfiguration
            .setDataSourceJndiName("java:jboss/datasources/MysqlDS");
      processEngineConfiguration
            .setTransactionManager(lookupTransactionManager());
      processEngineConfiguration.setDatabaseType("mysql");
      processEngineConfiguration.setDatabaseSchemaUpdate("true");
      processEngineConfiguration.setTransactionsExternallyManaged(true);
      processEngineConfiguration.setJobExecutorActivate(true);
      processEngineConfiguration.setMailServerPort(1025);
      processEngine = processEngineConfiguration.buildProcessEngine();
      return processEngine;
   }

Looking forward for the help~ Thank you.

[frederikherema1]

Is the logging configured correcltly? maybe the error is swallowed. Have you tried debugging the java-code, up to the point where the process is actually started?

[wenweikun]

Thank you for the reply, the logging config should be no problem since the other activiti exceptions show out correctly. I have debug the java code, I set the break point at businessProcess.startProcessByKey("poManagementProcess"); and System.out.println("————-Process started————"); I press F5 all the way down, but it seems no problem for me.(I have no knowledge at Activiti source code )
now my solution is create a service task  and use java mail for my mail sending task. It works fine now.

BTW, the sample process is :
<java>
  <process id="myProcess" name="My process" isExecutable="true">
    <startEvent id="startevent1" name="Start"></startEvent>
    <userTask id="usertask1" name="User Task"></userTask>
    <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow>
    <userTask id="usertask2" name="User Task"></userTask>
    <sequenceFlow id="flow2" sourceRef="usertask1" targetRef="usertask2"></sequenceFlow>
    <endEvent id="endevent1" name="End"></endEvent>
    <sequenceFlow id="flow3" sourceRef="usertask2" targetRef="endevent1"></sequenceFlow>
  </process>
</java>

and the following process did not work:
<java>
  <process id="myProcess" name="My process" isExecutable="true">
    <startEvent id="startevent1" name="Start"></startEvent>
    <serviceTask id="mailtask1" name="Mail Task" activiti:type="mail"></serviceTask>
    <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="mailtask1"></sequenceFlow>
    <userTask id="usertask1" name="User Task"></userTask>
    <sequenceFlow id="flow2" sourceRef="mailtask1" targetRef="usertask1"></sequenceFlow>
    <endEvent id="endevent1" name="End"></endEvent>
    <sequenceFlow id="flow3" sourceRef="usertask1" targetRef="endevent1"></sequenceFlow>
  </process>
</java>

[trademak]

That's because the mail task doesn't contain any elements like to recipient, subject etc. So this can't work. Or did you not include all the details?

Best regards,

[wenweikun]

I did contain the necessary elements of email task, actually the engine works well at another sample project using the same process.
The difference of  current project is I call the startProcess method at a asynchronous method of a stateless bean, I use this bean to listen to the change of a folder, once there is new xml file come in, then start a new process. I dont know if it is the source of the problem.

[jbarrez]

That shouldn't be a problem.

Can you reproduce it in a unit test? That's the easiest and quickest way  for us to verify and fix it.