I have something that I can’t understand , so I came to here and need your kindly help~
My process XML is below and my question is:
When I used service task between Parallel Gateway , my process instance just finish one of the services task , that means I used Parallel Gateway , but actually it finished only one task . Finding our docs , I found that
a single process instance are never executed concurrently and we have Optimistic Locking . So I configured service task like this
and I think that before task1 start , task2 start , but the result is unexcepted .
So I want to know what “Asynchronous Before” means . And another question is that if I meet
OptimisticLockingException , when the other service task will execute ?
Maybe that I misunderstand it and if there are two services in series , I configured Asynchronous : Before that means they won’t complete at the same time … Am I right ?
@GaoxiaoyuVV if you mark the service tasks asyncBefore:true, by default the property isExclusive:true also been set. So this will cause the execution of the tasks in sequence.
If you wanted to execute it in parallel set asyncBefore:true, isExclusive:false. From the docs,
Exclusive Jobs are the default configuration . All asynchronous continuations and timer events are thus exclusive by default. In addition, if you want a job to be non-exclusive, you can configure it as such using camunda:exclusive="false" .
Read this part in the docs about exclusive jobs: The Job Executor | docs.camunda.org
Really thank you for your kindly help ~ I will read it and have a try 
