Request.cookies: Discarded invalid value

What am I supposed to make of this:

There was 1 error encountered while processing this event

  • request.cookies : Discarded invalid value Expand

ruby: 2.6.3
sentry-raven: 2.9.0
rails: 5.2.3

1 Like

Could you take a screenshot of the error after you click expand, or share an issue link here?

I think this has something to do with how rails 5.2 handles cookie encryption.

I also think that rails does some obfuscation of sensitive cookies, so it may not be entirely necessary to hide all cookies from sentry. In creating the following commit, I noticed that before this middleware was executed rails had already changed some (sensitive?) cookie values to “[FILTERED]”

As an aside, I think that commit is incomplete since it leaves data[“request”][“cookies”] and data[“request”][“headers”] in an inconsistent state.