What is your server machine profile/spec?

As always, the server log ( trains-apiserver for start) and more details from the browser's developer tools Network section would be appreciated 🙂

m5.xlarge EC2 instance (4 vCPUs, 16 GB RAM), 100GB disk

Well, server seems OK, disk size might be a little on the low-end (just to be safe)

okay, give me a sec

Also, what's the Trains Server version?

btw, are there any examples of exporting metrics using Python client? I could only find last_metrics attribute of the task

0.16.1

tail of the api server log

network logs

And the trains-elasticsearch log?

OK, on first glance ES doesn't seem to have any issue

Is it possible to get a longer log file for the apiserver? From what I see, there's some kind of a connection pool issue

we do log a lot of the different metrics, maybe this can be part of the problem

This shouldn't be an issue, since the server should reuse connections, but perhaps the max connections limit on your server os relatively low?

Yeah, connections keep getting dropped since the pool is full

any suggestions on how to fix it?

Can you please check the max connections setting in your OS?

I'll try to check it out and get back to you, seems very strange

running
docker network prunebefore starting the containers kind of helped. I still see an error when I'm comparing > 20 experiments, but at least trains works okay after that, and there are no connection pool limit errors in the logs

I'll think about it and get back to you - it might be interesting to understand what causes this when comparing >20 experiments...

thanks!

Hi DilapidatedDucks58 , I am trying to reproduce the "Connection is full warning". Do you override any apiserver environment variables is docker compose? If yes then can you share your version of docker-compose? Do you provide a configuration file for gunicorn? Can you please share it?

nope, the only changes to config that we made are adding web-auth and non-responsive tasks watchdog

just in case, this warning disappeared after I https://stackoverflow.com/questions/49638699/docker-compose-restart-connection-pool-full

Great! What error do you still see in UI when comparing more than 20 experiments? At the time of error do you see any error response from the apiserver (in the browser network tab)? When the call to compare of 20+ task metrics succeed how much time does it usually takes in your environment?

Error
Failed to get Scalar Charts

Do you see any error in the browser network tab?

some of the POST requests "tasks.get_all_ex" fail as far as I can see

Can you share all the error info that you get in the network tab?

btw, there are "[2020-09-02 15:15:40,331] [9] [WARNING] [urllib3.connectionpool] Connection pool is full, discarding connection: elasticsearch" in the apiserver logs again