topic Re: Instances hang with concurrency in Alfresco Forum

Instances hang with concurrency

malizor — Fri, 09 Jun 2017 20:02:47 GMT

Hi,I attached a simple .BPMN with which I managed to reliably reproduce my issue.It only contains script tasks, though I originally noticed this behavior with Java service tasks.There are 5 script tasks witch are all marked as async. The first 4 do nothing and the fifth one sleeps for 2 minutes (in

Re: Instances hang with concurrency

Anonymous — Sat, 10 Jun 2017 12:49:03 GMT

If you want to increase the number of jobs to be executed concurrently, you should change asyncExecutorCorePoolSize and asyncExecutorMaxPoolSize.
https://github.com/Activiti/Activiti/blob/master/modules/activiti-engine/src/main/java/org/activiti/engine/impl/asyncexecutor/DefaultAsyncJobExecutor.java

The setting of asyncExecutorCorePoolSize is the thread pool size to execute async job.
Because asyncExecutorCorePoolSize' initial value is 2 and your process sleep, the two process's scripts of your five process occupy the thread pool.

Re: Instances hang with concurrency

malizor — Mon, 12 Jun 2017 18:02:27 GMT

Thank you for your answer.

As explained in my question, I already modified these settings. But your comment made me double check and I noticed the settings were not taken into account because of a missing line in my conf file.

So that's all good. Now I'm going to fine-tune those parameters for my actual use case.

Re: Instances hang with concurrency

Anonymous — Mon, 12 Jun 2017 19:46:48 GMT

I'm sorry that I don't know how to set asyncExecutorCorePoolSize in activiti-explorer.

I tested your process by customizing ActivitiEngineConfiguration.class.

@Bean(name="processEngineConfiguration")
public ProcessEngineConfigurationImpl processEngineConfiguration() {
  SpringProcessEngineConfiguration processEngineConfiguration = new SpringProcessEngineConfiguration();
  processEngineConfiguration.setAsyncExecutorCorePoolSize(100);
  processEngineConfiguration.setAsyncExecutorMaxPoolSize(2000);