Runtime: quarkus

Persistance: postgresql

Prop: kogito.persistence.optimistic.lock=true

Process (each parallel task is executing async by jobs service):

We use a simple load test where 500 processes are run in a loop:

Concurrency Thread Group parallel async.jmx

If the stub has no delay time and the response is sent immediately, a WorkItemNotFoundException is thrown. (this application runs in pod 2CPU /2 Gb RAM and the error occurs approximately 15 minutes after the start of the load test).
The error stops appearing after a delay on the plug of about 0.5 seconds