The W3C trace context headers of the operation in progress, for an outgoing
HTTP request.
Put these headers on the request.
The service that answers it can then put its own work in this trace.
The headers describe the span that is active now.
When no span is active yet -- a request the Action makes before it starts a
span of its own -- they describe the span that $TRACEPARENT names, which is
the span of the program that started this one.
The result is empty when the export is off.
A no-op span's context is all zeroes, and is not a valid parent.
The W3C trace context headers of the operation in progress, for an outgoing HTTP request.
Put these headers on the request. The service that answers it can then put its own work in this trace.
The headers describe the span that is active now. When no span is active yet -- a request the Action makes before it starts a span of its own -- they describe the span that
$TRACEPARENTnames, which is the span of the program that started this one.The result is empty when the export is off. A no-op span's context is all zeroes, and is not a valid parent.