Not thread safe

[Dawars]

When I use gin config for hyperparameter search with optuna and it starts multiple processes at the same time I get the following error:
Attempted to modify locked Gin config

This is because internally gin stores the configs in global variables.

Is there a way to fix this?

[jingnanshi]

You should be able to avoid this by doing something similar to this: https://gist.github.com/sile/1158ba37ff5b8c290f8953acebffed80. Essentially you want to have a separate gin config for each process.