The Job Executor: What Is Going on in My Process Engine?
Sometimes we start a process, and after some initial processing, it does not continue for no apparent reason. Usually, this happens at asynchronous continuations or BPMN timer events, so points in the process where the job executor, the process engine’s component for deferred work, takes over. While the job executor is a well-tested and battle-proven piece of software, it is not a closed system. It integrates with a relational database, an application server and the processes and applications it runs. Problems with job execution typically arise in this interaction of components. In this article, we look at common reasons why job execution can be delayed or stuck, how to diagnose, and how to resolve them.