Cron job exited after undefined amount of time

[LeeU1911]

Hey there,

Thanks for your great work!

I'd like to ask whether anyone runs into the same problem. I built a cron job that checks my gmail inbox every 10 seconds using Gmail API. The code runs fine but it quits running after a while.

By monitoring, I can see sometimes it quits after 3 hours, 8 hours or sometimes just around 15 20 minutes. I monitored the memory of the process but it looks like there is no memory leak issue since it take stably around 12MB when running for 1 minute.

Please comment if you ran into this problem or you have some clue about it.

Thank you, Vu

[alexanderbez]

It may have to do with the following: https://github.com/jasonlvhit/gocron/blob/master/gocron.go#L38

[alexanderbez]

@jasonlvhit if you have a slice of a predefined size and simply don't want to append, when an overflow happens perhaps you can just flush and wrap back to the beginning? I'd be happy to help contribute.

[LeeU1911]

Thanks @alexanderbez but I don't get it yet. Isn't that constant the number of jobs? I only have one job.

[alexanderbez]

Ahhh good catch @LeeU1911, I'll keep poking around. It could something on the system level killing it like oom.

[JohnRoesler]

I am seeing this same issue. Job runs for sometimes one hour, sometimes four hours, then stops. No errors, app doesn't restart, but job just seems to stop running.

@preslavrachev @Streppel

[Streppel]

@JohnRoesler strange... I have a job running for weeks with no problem. I'll investigate

[JohnRoesler]

I've been debugging on my end as well. It's running in docker. Tried increasing mem/cpu, still seeing it stop.

[JohnRoesler]

It's not that the job is actually stopping my case. There are no errors, it just takes long breaks on job that's scheduled to run every 5 minutes.

Here is a screen shot of logs over a 12 hour period:

Pretty sure it's not a resource issue as the docker container running the cron as an excessive amount of mem/cpu and usage is about 2% of resources.

Update - Nothing wrong with gocron! 🎉 It was a bug in my task that was causing the program to sleep for long periods of time. Sorry for the false alert.

[truztee]

Hi, currently I have this issue..

I have a simple job to run every 5s. But the job seems suddenly stop after a random amount of time

I run the service using systemd. With this configuration:

Description=Devops Redis Agent
After=network.target

[Service]
Type=simple
ExecStart=/usr/bin/devops-redis-agent
User=devops-agent
Group=devops-agent

[Install]
WantedBy=multi-user.target

for now, I add auto restart every hour in the systemd configuration. PS, the CPU and memory load seems OK

[JohnRoesler]

@truztee this repo is no longer maintained sadly. Come checkout our fork that is very well maintained and updated! https://github.com/go-co-op/gocron

[truztee]

@truztee this repo is no longer maintained sadly. Come checkout our fork that is very well maintained and updated! https://github.com/go-co-op/gocron

ic... thank you for the information