I installed the driver by downloading  ODBC-2023.1.0.229.0-macos.tar.gz from the community github repo. I am not sure *-macos.tar.gz is for Apple Silicon.

odbcinst -j gives:

and sudo fs_usage isql | grep ini :

so it looks like the driver is reading the correct configuration files.

The log file shows:

and this looks like the problem. The error was the same in both HOST=localhost and HOST=127.0.0.1.

There was a typo in my code, and just copying the stream to the new call request worked as expected.

Thanks for your comment!

Ah.. That was it.

I was switching to root while building the image for installing jdk.. Adding 'USER irisowner' at the end of Dockerfile solved the issue. Thank you!