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fix(dynamic-sampling): Do not crash in Span.Finish() when Client is empty #520

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merged 4 commits into from
Jan 11, 2023

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tonyo
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@tonyo tonyo commented Dec 20, 2022

Making a draft since I'm not entirely sure if there are any other places right now where we might have this issue, and also because I'll have to confirm what DynamicSamplingContext to return when Client or Scope are empty.

Should be ready for review now.

Fixes #518.

@tonyo tonyo self-assigned this Dec 20, 2022
@tonyo tonyo requested a review from cleptric December 20, 2022 16:46
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This will attach the DSC to the event here

if !s.dynamicSamplingContext.IsFrozen() {

In the transport, we'll skip attaching the DSC as it's empty
https://github.com/getsentry/sentry-go/blob/master/transport.go#L103

I think this is a feasible solution.

@tonyo tonyo changed the title fix(dynamic-sampling): Do not crash when Client is empty fix(dynamic-sampling): Do not crash in Transaction.Finish() when Client is empty Jan 9, 2023
@tonyo tonyo changed the title fix(dynamic-sampling): Do not crash in Transaction.Finish() when Client is empty fix(dynamic-sampling): Do not crash in Span.Finish() when Client is empty Jan 9, 2023
@tonyo tonyo marked this pull request as ready for review January 9, 2023 16:39
@tonyo tonyo requested a review from cleptric January 9, 2023 16:39
if client == nil || scope == nil {
return DynamicSamplingContext{
Entries: map[string]string{},
Frozen: false,
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Made it more explicit to make sure there are no default-value surprises.

@tonyo tonyo merged commit 3c8662b into master Jan 11, 2023
@tonyo tonyo deleted the fix/crash-dynamic-sampl-client branch January 11, 2023 09:32
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panic because nil client in DynamicSamplingContextFromTransaction
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