GAE > Logging > Flask Python Server > ttrace_id missing (sometimes)
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Sebastien Dupere
Apr 23, 2020, 10:07:22 PM4/23/20
to Google App Engine
Problem Some requests are missing the following label in our Logging:
One of the biggest culprit here is our health check query,
We think it's because the health check does not have the header: X_CLOUD_TRACE_CONTEXT
We can't find official documentation of this though and would like some explanations on when the trace_id is NOT being populated.
This is not a bug, we only want to be sure we understand.
Sebastien Dupere
Apr 23, 2020, 10:07:41 PM4/23/20
to Google App Engine, Gary Carino
Sebastien Dupere
Apr 27, 2020, 12:20:59 PM4/27/20
to Google App Engine
Answer from Pamela Delaney (@dpamela):
Hi. The header name is: X-Cloud-Trace-Context
- For sample use of https://cloud.google.com/trace/docs/quickstart#instrumentation
- For a bit more information, see https://cloud.google.com/trace/docs/setup#sampling_rate
Trace doesn't normally trace every request due to the performance impact.
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