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threading integration cannot be used with NoopTracer

See original GitHub issue

The NoopTracer does not implement sampler, exporter, or propagator but the threading integration assumes that the tracer available has those properties. This can either be fixed by adding the properties to NoopTracer or making the threading integration check for them explicitly.

Happy to submit a fix with some guidance on direction.

Issue Analytics

State:
Created 5 years ago
Reactions:2
Comments:11 (8 by maintainers)

Top GitHub Comments

3reactions

colincadamscommented, May 3, 2019

One of the confusing things to me when reading the trace code is that there are two different objects called Tracer.

opencencus.trace.tracer.Tracer
- attributes: sampler, exporter, propagator, tracer
opencensus.trace.tracers.base.Tracer
- context_tracer.ContextTracer, noop_tracer.NoopTracer inherit from it

Typically the first opencensus.trace.tracer.Tracer is put in the execution_context as is done by the Tracer.store_tracer() method on that object. However by default the execution_context holds a NoopTracer.

1reaction

lzchencommented, May 4, 2020

Those fields are no longer part of the Tracer.

Sampler is part of TracerProvider. Exporter is part of SpanProcesser which is in turn part of TracerProvider

Propagator is set globally or instantiated manually

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