Hello, I'm trying to run the supertools postgres docker image for the first time locally to try out ...

zngb

06/03/2022, 4:22 PM

Hello, I'm trying to run the supertools postgres docker image for the first time locally to try out stuff. I get a message like this pretty early in the container logs:

Driver class org.postgresql.Driver not found in Thread context class loader jdk.internal.loader.ClassLoaders$AppClassLoader@942a29c, trying classloader java.net.URLClassLoader@6a024a67

Is this normal and I have some configuration error?

rp_st

06/03/2022, 4:28 PM

Hey! This is quite unusual. What is your docker compose file? Can you send it so i can try and replicate this?

zngb

06/03/2022, 4:30 PM

I'm not using a compose file ATM, just running with

docker run

, see my message below for my arguments 🙂

rp_st

06/03/2022, 4:30 PM

Ah right. So is

host.docker.internal

getting resolved?

zngb

06/03/2022, 4:35 PM

I tried resolving host.docker.internal from another container but that failed, maybe I'm donig something weird or my docker version is strange

rp_st

06/03/2022, 4:36 PM

I also just tried a similar command on my system right now and it worked:

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docker run --name supertokens -e POSTGRESQL_CONNECTION_URI="postgresql://root:root@192.168.1.18:5432/supertokens" registry.supertokens.io/supertokens/supertokens-postgresql

rp_st

06/03/2022, 4:36 PM

Maybe try following this blog: https://supertokens.com/blog/connect-supertokens-to-database

rp_st

06/03/2022, 4:37 PM

I think the issue might be to do with

host.docker.internal

part of the connection URI that you are giving.

zngb

06/03/2022, 4:38 PM

thanks, i'm going to try a few things, maybe I need some networking flag to bridge the host's network

rp_st

06/03/2022, 4:39 PM

yea. Maybe. If you run into this issue again, maybe trying removing the image from your system and repulling it

zngb

06/03/2022, 4:41 PM

https://stackoverflow.com/a/62431165 this seems to do the trick

zngb

06/03/2022, 4:41 PM

thanks

rp_st

06/03/2022, 4:41 PM

ok great!

zngb

06/03/2022, 4:43 PM

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docker run --name supertokens -e POSTGRESQL_CONNECTION_URI="postgresql://postgres:blablabla@host.docker.internal/supertokens" -d --add-host=host.docker.internal:host-gateway registry.supertokens.io/supertokens/supertokens-postgresql

zngb

06/03/2022, 4:45 PM

I was initially thinking something is strange with the Java class loader, maybe some error message gets swallowed somewhere so we don't see a clear "can't resolve host"

rp_st

06/03/2022, 4:45 PM

Yeaaa. That is a bit strange indeed.

rp_st

06/03/2022, 4:47 PM

My guess is that the class that parses and connects to a connection URI tries to fine the right type of connector / driver based on the syntax of the provided string. And for the string you provided, it couldn’t find any such driver. Hence that error.

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