Is it thread safe in Thin, Puma ...etc?

[HirokiDaido]

I think, Thread.current is not safe in threaded web servers, like Thin or Puma.
Maybe, it is better to use request_store gem isn't it?

[nay]

I think it might be trouble if you read operator before you set operator value (including nil) for each request. Yes, It would be better to use request_store gem. Thank you.

( I should update this gem but need some time... )