Lock already taken - skipping run

[ilmoi]

I'm new to rq-scheduler so pardon if this is a stupid question.

Recently when looking through my app's logs I've started seeing this:

scheduler_1 | 10:48:05 Lock already taken - skipping run

I have rq scheduler running in a Docker container as part of a bigger docker-compose app. I have 1 scheduler and some 15 workers, + Redis to record jobs.

What exactly does the above line mean? Did I somehow end up with more than 1 scheduler process? I seem to never have had more than one scheduler container running (I checked).

[ilmoi]

My bad, I really should have read the docs better. For anyone coming across this in the future the answer is here and here.

Amazing system btw, really re-assuring to know that's how multiple schedulers work!