What killed my process and why?

Question

My application runs as a background process on Linux. It is currently started at the command line in a Terminal window.

Recently a user was executing the application

Answer 1

In my case this was happening with a Laravel queue worker. The system logs did not mention any killing so I looked further and it turned out that the worker was basically killing itself because of a job that exceeded the memory limit (which is set to 128M by default).

Running the queue worker with --timeout=600 and --memory=1024 fixed the problem for me.