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.

[Criswim]

@Dawars have you fixed your problem? I also get the error 'Attempted to modify locked Gin config' when I run my code. I want to use the same .gin file in each iteration.
According to the suggestion from @jingnanshi , I have tried to make a copy of the .gin file with a new name in each iteration and then use the gin.parse_config_files_and_bindings() function, but it didn't work.