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Clarify behavior when receiving a tracestate header without traceparent #326

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Jul 25, 2019
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Clarify behavior when receiving a tracestate header without traceparent #326

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5 changes: 3 additions & 2 deletions spec/30-processing-model.md
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Expand Up @@ -12,8 +12,9 @@ If no traceparent header is received:

1. The vendor checks an incoming request for a `traceparent` and a `tracestate` header.
2. If _no_ `traceparent` header is received, the vendor creates a new `trace-id` and `parent-id` that represents the current request.
3. The vendor SHOULD modify the `tracestate` header by adding a new key/value pair.
4. The vendor sets the `traceparent` and `tracestate` header for the outgoing request.
3. If a `tracestate` header is received without an accompanying `traceparent` header, it is invalid and MUST be discarded.
4. The vendor SHOULD create a new `tracestate` header and add a new key/value pair.
5. The vendor sets the `traceparent` and `tracestate` header for the outgoing request.

## A traceparent is Received

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