SpanProcessor with better Sampler #902
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This reverts commit 2ced90e.
* Better span sampler This updates OpenTelemetry.Sampler so that it uses `traces_sample_rate` for sampling spans before they get sent to the span processor. This way we're not processing spans when they are dropped during sampling, which was previously the case as the Client was responsible for sampling just before attemping to send a transaction. * Enhance sampling logic to record discarded transactions * Clarify trace-level sampling decision-making Previously it incorrectly referred to "parent" where in reality we're dealing with spans from the same trace and respect sampling decisions that were already made for a given trace. This is not the same thing as parent/child spans that we're handling in the SpanProcessor as this type of relationship is established post-sampling. * Remove unnecessary sleep calls in sampler tests * Fix flaky test * Clean up make_sampling_decision * Simplify client reports for dropped transactions * Update traces_sample_rate default value to be nil * Account for `nil` sample_rate when sampling * Use put_test_config * Update traces_sample_rate spec to allow nil value
solnic
force-pushed
the
span-processor-with-new-sampler
branch
from
d6af772 to
58ce111
Compare
* Add support for `traces_sampler` config option * Update docs * Remove unnecessary attribute merging * Call traces_sampler only for root spans * Reuse sampling decision logic * Add test for handling invalid traces_sampler return values * Add tests for SamplingContext access functions
solnic
force-pushed
the
span-processor-with-new-sampler
branch
from
56a0ca8 to
aedc326
Compare
sl0thentr0py
approved these changes
Jun 17, 2025
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This is re-adding what #875 added but we had to revert it for 10.10.0 "emergency" release with OTP-28 fixes.
This will includes a better sampler via #903 and support for
traces_sampleroption via #910.