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[Traces] Add error sampling with opt-in tracer-drop rescue - #169

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lucaspimentel wants to merge 44 commits into

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lpimentel/add-error-sampler

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[Traces] Add error sampling with opt-in tracer-drop rescue#169
lucaspimentel wants to merge 44 commits into
mainfrom
lpimentel/add-error-sampler

Commits on Oct 29, 2026
- Rescue errored P0 trace chunks from backend drop
  lucaspimentel
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  7fe06d2
- Exercise error rescue in stats regression tests
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  564be54
- Read sampler clock while holding the sampler lock
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  1afaef4
- Clamp sampler timestamps against backward clock steps
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  de7b2b7
- Match test oracle env with processor fallback env
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  5d85cc9
- Match clone-budget oracle env with processor fallback env
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  1f0b4b1
- Document root-resolution fallback in sampler doc comment
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  5deac43
- Share the payload-env fallback rule between stats and error rescue
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  8e24907
- Fix error-rescue clock read to happen under the sampler lock
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  2f02440
- Simplify error rescue tests
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  b085e5a
- Add opt-in rescue for tracer-dropped errors
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  06a9867
- Simplify error rescue test assertions
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  386dab1
- Remove SCL error sampler mode setting
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  0e4e198
- Share error sampler floor under one mutex
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  e80c87f
- Route error rescue through shared clock helper
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  9505798
- Rescue errored no-priority chunks
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  39cd5ed
- Decouple error rescue from stats computation
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  a7558f2
- Consolidate error rescue eligibility tests
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  efd82e5
- Merge empty-chunk rescue tests
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  9d90fd0
- Consolidate error sampler adapter tests
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  7cd0ca2
- Simplify shared error sampler budget test
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  d6e1314
- Simplify error sampler config tests
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  4f52deb
- Simplify error rescue processing and tests
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  3bfc032
- Skip error sampler lock without rescue candidates
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  a815732
- Focus error rescue tests on distinct guarantees
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  6360b4e
- Simplify error rescue with lazy locking
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  92c1956
- Consolidate error rescue clock regression tests
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  ac4206d
- Consolidate disabled error rescue tests
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  4502f3c
- Remove tests for unused error sampler setting
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  c57ffd3
- Focus error rescue config tests on wiring
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  5368b56
- Focus decision maker tests on precedence
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  29b80dd
- Simplify disabled error rescue warning test
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  81bf176
- Remove redundant rescue root bounds checks
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  4f7a967
- Clarify shared error rescue state construction
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  b50cdb1
- Consolidate error rescue eligibility docs
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  c91d837
- Stop rescuing errored no-priority chunks
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  7d6a9ce
- Reuse sampler defaults for error TPS config
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  f704442
- Treat blank DD_APM_ERROR_TPS as unset
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  715f35f
- Remove redundant unreadable DD_APM_FEATURES test
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  ab453b8
- Trim error rescue tests that re-test the sampler
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  b7342b1
- Build error rescue state inside the trace processor
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  31fa60d
- Hold the error sampler lock only while sampling
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  db0bbc6
- Move payload env fallback next to the config
  lucaspimentel
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  0cad05a
- Drop the tracing-test dev-dependency
  lucaspimentel
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  0d6f521

Commits

Commits on Oct 29, 2026