feat(opentelemetry)!: Exclusively pass root spans through sampling pipeline #14951
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lforst
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lforst
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January 9, 2025 11:06
…-sampler-for-all-root-spans
lforst
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Jan 9, 2025
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| if ( | ||
| !sampled && | ||
| // We check for `parentSampled === undefined` because we only want to record client reports for spans that are trace roots (ie. when there was incoming trace) | ||
| parentSampled === undefined | ||
| ) { | ||
| DEBUG_BUILD && logger.log('[Tracing] Discarding root span because its trace was not chosen to be sampled.'); | ||
| this._client.recordDroppedEvent('sample_rate', 'transaction'); | ||
| } |
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@mydea would you mind checking, is this still correct?
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We are changing the behavior for
tracesSamplerso that it is no longer passed every span, but only root spans. We do this to ensure and steer users towards making consistent and deterministic sampling decisions for traces.This is needed as a first step for #14932