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fix: Create a frozen DSC when calling ToBaggage #566

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merged 4 commits into from Feb 2, 2023
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@cleptric cleptric commented Feb 2, 2023

This fixes an issue, where someone would call span.ToBaggage to fetch the DynamicSamplingContext to attach it to an outgoing HTTP request "baggage" header or to render it in an HTML template as a "baggage" meta tag before the transaction is finished.

We need to freeze the DynamicSamplingContext in such cases, as any mutations after the DynamicSamplingContext was propagated to a downstream SDK mess up DynamicSampling.

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codecov bot commented Feb 2, 2023

Codecov Report

Base: 74.71% // Head: 74.72% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (97203de) compared to base (fb76180).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files
@@           Coverage Diff           @@
##           master     #566   +/-   ##
=======================================
  Coverage   74.71%   74.72%           
=======================================
  Files          38       38           
  Lines        3837     3838    +1     
=======================================
+ Hits         2867     2868    +1     
  Misses        850      850           
  Partials      120      120           
Impacted Files Coverage Δ
otel/propagator.go 91.66% <100.00%> (-0.44%) ⬇️
tracing.go 87.91% <100.00%> (+0.13%) ⬆️

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@cleptric cleptric enabled auto-merge (squash) February 2, 2023 12:41
@cleptric cleptric merged commit d0a2aa3 into master Feb 2, 2023
@cleptric cleptric deleted the fix-to-baggage branch February 2, 2023 12:48
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