Strange time delay between start-process call and real task running

Camunda 7 Topics Discussion & Questions
1

Hello, world.

I encountered a strange delay while executing processes on Camunda.

We have some BPMN-process and perform some load testing.
We see a strange effect on some processes. The following happens:

  1. We make REST-call to start process lane (“/rest/process-definition/key/$processName/start”)
  2. We receive an instant response 200 synchronously
  3. There are time delay - sometimes it take 2-3 minutes, sometimes 15 minutes, even 3 hours o_O
  4. The process passes successfully from the start event through all tasks and properly ends with the end event. All tasks are completed quickly and correct.

Delay between REST call and start event launching is fluent - there is no such delay on most processes, the processes starts instantly as a rule. But those cases when there is such a delay cause concern.

What could be the reason for such a time delay? From which side do I need to approach this issue?

Thank you in advance. Any ideas are appreciated.

2

Hi @Franco,

So I assume that you have some async set before or after the start event.

I would go and examine the job execution as written here: The Job Executor: What Is Going on in My Process Engine? | Camunda

Hope this helps, Ingo