Sandeep More created KNOX-2704:
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             Summary: Honor request id (correlation id) set by upstream 
loadbalancer
                 Key: KNOX-2704
                 URL: https://issues.apache.org/jira/browse/KNOX-2704
             Project: Apache Knox
          Issue Type: Bug
          Components: Server
            Reporter: Sandeep More
            Assignee: Sandeep More


In case request Id/correlation id is set by upstream LB (e.g. nginix) (or other 
components) do not generate one and use the one passed. 

Request Id also known as trace id is passed as a  "X-Request-Id" header value. 
This is a good blog post on how it can be used
https://blog.heroku.com/http_request_id_s_improve_visibility_across_the_application_stack

This would help Knox be in line with other components supporting trace id for 
better telemetry and tracing.




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