Kamon context propogation issue between spring filter and controller

[pparkar]

Discussed in #1257

^{Originally posted by pparkar January 31, 2023}
We have a spring application with basic request filter and controller.

• Creating a kamon context in request filter

         val kamonContext = Context
          .of(KamonConstants.requestIdKey,Some(request.getHeader("request-id"))
          .withEntry("user-id", fetchUserIdInFilter())

        Kamon.runWithContext(kamonContext) {
          filterChain.doFilter(request, response)
        }

• Trying to access the values added in request filter from controller, however the context seems to get overridden
  Kamon.currentContext().get("user-id") comes as null
  Kamon.currentContext().get("request-id") comes as null
• The kamon context object hash is the same on both the filter and controller. But somehow the context details does not seem to propogate.

Can someone provide any pointers on what could be happening? Thanks!