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

Merged

lucaspimentel merged 49 commits into

mainfrom

lpimentel/add-error-sampler

Nov 4, 2026

Merged

[Traces] Add error sampling with opt-in tracer-drop rescue#169
lucaspimentel merged 49 commits into
mainfrom
lpimentel/add-error-sampler

Commits on Nov 4, 2026
- Rescue errored P0 trace chunks from backend drop
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  8b61cdc
- Exercise error rescue in stats regression tests
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  711b812
- Read sampler clock while holding the sampler lock
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  0816af3
- Clamp sampler timestamps against backward clock steps
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  5f5b483
- Match test oracle env with processor fallback env
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  c71ef79
- Match clone-budget oracle env with processor fallback env
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  1296884
- Document root-resolution fallback in sampler doc comment
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  9f741d9
- Share the payload-env fallback rule between stats and error rescue
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  50a8e47
- Fix error-rescue clock read to happen under the sampler lock
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  54925ad
- Simplify error rescue tests
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  bf785df
- Add opt-in rescue for tracer-dropped errors
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  d9d694d
- Simplify error rescue test assertions
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  a104da0
- Remove SCL error sampler mode setting
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  134039d
- Share error sampler floor under one mutex
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  d1241ae
- Route error rescue through shared clock helper
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- Rescue errored no-priority chunks
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  cd727ce
- Decouple error rescue from stats computation
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  5ffcd60
- Consolidate error rescue eligibility tests
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  71f136a
- Merge empty-chunk rescue tests
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  ce5b24c
- Consolidate error sampler adapter tests
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  8fb7f79
- Simplify shared error sampler budget test
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  b9218ca
- Simplify error sampler config tests
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  c707b2b
- Simplify error rescue processing and tests
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  d02d286
- Skip error sampler lock without rescue candidates
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  eb5a37b
- Focus error rescue tests on distinct guarantees
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  650b34d
- Simplify error rescue with lazy locking
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  e8dd83b
- Consolidate error rescue clock regression tests
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  40d313e
- Consolidate disabled error rescue tests
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  1c5bd08
- Remove tests for unused error sampler setting
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  ad7a811
- Focus error rescue config tests on wiring
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  99a3223
- Focus decision maker tests on precedence
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  3d216c0
- Simplify disabled error rescue warning test
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  cd0e4b9
- Remove redundant rescue root bounds checks
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  26c78cc
- Clarify shared error rescue state construction
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  04254ac
- Consolidate error rescue eligibility docs
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  0d2981d
- Stop rescuing errored no-priority chunks
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  ee070ea
- Reuse sampler defaults for error TPS config
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  2ee0a89
- Treat blank DD_APM_ERROR_TPS as unset
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  8def48a
- Remove redundant unreadable DD_APM_FEATURES test
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  eab9269
- Trim error rescue tests that re-test the sampler
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  0e98749
- Build error rescue state inside the trace processor
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  3986519
- Hold the error sampler lock only while sampling
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  5aca291
- Move payload env fallback next to the config
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  d1bd513
- Drop the tracing-test dev-dependency
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  4d623eb
- Remove duplicate error-rescue priority test
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  503addb
- Simplify empty-chunk rescue test to one config
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  f456144
- Test client sample rate wiring, not keep counts
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  70ed349
- Simplify error rescue rules and verification
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  8d484f7
- Avoid blocking async workers during error rescue
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  1bfef7d

Commits

Commits on Nov 4, 2026