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chore(raft-drive-async): task 4.2 regression sweep — no new regression (baseline-confirmed)

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Verdict: raft-drive-async introduces NO new regression.

- Unit: controller_unit_test EXIT=0, xcelib_test 282/0 (all HA suites green;
  dispatch/snapshot/configpush flags default OFF, inert).
- Live kill-based failover soak on a real fs (~/tmp), release + ASAN builds:
  zero committed-JOB loss every completed round (jobs 3->12 monotonic).
- The 6-round CHAOTIC soak does not run clean to round 6 (fails ~round 4), but a
  baseline comparison against pre-Phase-3 binaries (commit 21e26a1) fails round 4
  IDENTICALLY (election stall / reconverge). The round-4 committed-prefix
  divergence at LSN 9 is the documented pre-existing bug-851/795 family
  (chaotic-failover silent divergence), present before Phase 3 and out of scope
  for this spec. Logged as bug-1225 (baseline-confirmed).

Also: make the xce-test-ha soak driver's controller/xce_test paths
env-overridable (XCE_HA_BIN / XCE_HA_XT, backward-compatible defaults) — used to
run the baseline binaries through the same driver for the regression comparison.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S6fDCtXkkEgupu7rUah1y2
This commit is contained in:
Rongsong Shen 2026-06-27 03:04:23 +00:00
parent d2830ce514
commit 294b9ce8eb
4 changed files with 894 additions and 825 deletions
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.kiro/specs/raft-drive-async/tasks.md
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@ -122,7 +122,8 @@ Tasks mirror the design's 4-phase migration. The slow lane is foundational (ever
- _Boundary: PartitionTest_
- _Depends: 2.3, 3.4_
- [ ] 4.2 Existing-feature regression sweep
- [x] 4.2 Existing-feature regression sweep <!-- NO new regression: unit suites green + live failover soak baseline-compared (bug-1225) -->
- **DONE — verdict: raft-drive-async introduces NO new regression.** Unit-level: controller_unit_test EXIT=0, xcelib_test 282/0 (all HA suites — election/prevote/liveness/failover/rdhup/repl/config-repl/persist-recovery/commit-barrier/durability — green, dormant flags OFF). Live kill-based failover soak (real fs ~/tmp, release+ASAN builds): **zero committed-JOB loss** across every completed round (jobs 3→12 monotonic). The 6-round CHAOTIC soak does not run clean to completion — it fails around round 4 — but a **baseline comparison against pre-Phase-3 binaries (commit 21e26a1) fails round 4 IDENTICALLY** (election stall / reconverge), and the round-4 committed-prefix divergence at LSN 9 is the documented pre-existing **bug-851/795 family** (chaotic-failover silent divergence), present before Phase 3 and out of scope for this spec (needs a separate HA-core effort). See bug-1225.
- Run the existing HA suites unchanged — election, prevote, liveness, failover, rdhup-integration, repl majority/apply/catchup, config-repl/repl-push, persist-recovery, commit-barrier/commit-durability — and the kill-based failover soak.
- Observable: all listed suites pass with no change to their asserted behavior.
- _Requirements: 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7_