appneta/oboe-ruby — pull request #6 by pglombardo (2013-11-21 15:33:33+00:00)
Title: Need to validate net/http returned X-Trace ID value to defend against header caching

If there is a cache (e.g. varnish) between a net/http call and the called service that is also instrumented, there are situations where the same X-Trace ID could be returned multiple times for multiple requests breaking the trace chain.