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[zipkin] Encode span IDs as full 16-hex strings #601
Merged
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Based on the openzipkin/b3-propagation specification, the SpanID and
ParentSpanID are to be encoded as 16 lower-hex characters.
#533 fixed this for TraceID, and fixed the SpanID.String() method, but did not update the Zipkin Propagator to use the fixed SpanID encoding.
This fix uses SpanID.String() to ensure proper encoding of the SpanID and ParentSpanID within the Zipkin Propagator.
Signed-off-by: Nathan Bowler [email protected]