I recently upgraded my Rails app from 6.1 to 7.2, and after doing this, I found that my logging volume for requests went up a lot. I inspected some of the logs and saw that they are looking like:

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[6fd9a83d-0d","partial_message":"true"}

My environments config file has it in:

config.log_tags = [ :request_id ]

If I remove that, then the request logging goes back to normal and no longer has that list of UUIDs in it.

I manually hit a controller endpoint and logged out request.request_id and it has in it:

"action_dispatch.request_id"=>"8f2f673b-4764-4909-b9b3-9161b3f53bad"

There is no actual long list of ids anywhere in the request headers, so why/how is it turning into a long list when config.log_tags is used?