Error: signal only works in main thread of the main interpreter

[MinHyeong-Lee]

I built custom image by referring to the fappe_docker repo and operating a production env.

Sometimes, execute “docker compose down” and “docker compose up” for restart service the above error appears.

CMD [
“/home/frappe/frappe-bench/env/bin/gunicorn”,
“–chdir=/home/frappe/frappe-bench/sites”,
“–bind=0.0.0.0:8000”,
“–threads=4”,
“–workers=33”,
“–worker-class=gthread”,
“–worker-tmp-dir=/dev/shm”,
“–timeout=120”,
“–preload”,
“frappe.app:application”
]

This is my command settings for custom image.
Can anyone tell me what I can try to avoid the above error when restarting.

Thank you.

[MinHyeong-Lee]

I solved this problem.

The problem was kill main process while execute background job.

Then, redis queue try to response to frappe for failed reason with abandoned job.

In this process, a problem occurs because the pid of the frappe that the redis queue is trying to connect to changes after restarting.

So I run this command before shutting down the server.
bench disable-scheduler && bench execute frappe.core.doctype.rq_job.rq_job.remove_failed_job

You can avoid this conflict by executing remove_failed_job.