Quartz Scheduler suddenly stop running and no exception error

Question

I have some quartz job which was running everyday at 7pm. Suddenly it failed to run. I check my server.log and there are no exception thrown. Anyone have any idea what could

Answer 1

In my case I had an open connection to the database. When the I had no more connections available, my threads remained waiting forever. As I could not start any other jobs, nothing happened and everything stayed blocked. My advice is for you to check if you have any blocking resource that you might need to release.