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24 commits

Author SHA1 Message Date
Rongsong Shen
95629797f8 feat(raft-sim-conformance): optional TLC-consumable trace export, default-off (task 8.1) 2026-06-24 16:49:36 +00:00
Rongsong Shen
90197f8595 test(raft-sim-conformance): negative test proving oracle teeth, both directions (task 7.2) 2026-06-24 16:30:20 +00:00
Rongsong Shen
62523892d9 feat(raft-sim-conformance): runtime fault-injection switch (G1 term-stamp, G3 truncate) (task 7.1) 2026-06-24 16:15:13 +00:00
Rongsong Shen
7087dc19d9 docs(raft-sim-conformance): mark task 6.2 done — conformance batch ASAN/UBSAN-clean 2026-06-24 16:04:29 +00:00
Rongsong Shen
47f68032b7 test(raft-sim-conformance): randomized M-seed sweep + all scenarios, zero violations (task 6.1) 2026-06-24 15:59:22 +00:00
Rongsong Shen
a2933c274d feat(raft-sim-conformance): stale-rejoin scenario, bug-851 G5 term adoption via AE (task 5.5) 2026-06-24 15:50:13 +00:00
Rongsong Shen
b1f289d2cb feat(raft-sim-conformance): Figure-8 commit-safety scenario + restore dropped 5.3 impl (task 5.4) 
Adds raft_sim_scenario_figure8: a previous-term entry on a quorum under a
new-term leader is NOT committed until a current-term entry commits (library-
gated by raft_advance_commit; verified by a mutation test). Also restores the
raft_sim_scenario_drop_dup_reorder implementation that commit e445404 (task 5.3)
silently dropped from raft_sim.c (a stray git checkout reverted the uncommitted
impl), which had left the lib build broken with an undefined reference.

Build green: test_sim_5_3_drop_dup_reorder + test_sim_5_4_figure8 both PASS.
 2026-06-24 15:38:01 +00:00
Rongsong Shen
e445404439 feat(raft-sim-conformance): drop/duplicate/reorder adversarial scenario (task 5.3) 2026-06-24 15:09:31 +00:00
Rongsong Shen
6976392d77 feat(raft-sim-conformance): restart-churn adversarial scenario (task 5.2) 2026-06-24 14:47:25 +00:00
Rongsong Shen
7d0964dd16 feat(raft-sim-conformance): partition/heal adversarial scenario (task 5.1) 2026-06-24 14:34:22 +00:00
Rongsong Shen
b844e75f3b feat(raft-sim-conformance): raft_sim_run + deterministic replay (task 4.4) 2026-06-24 14:14:15 +00:00
Rongsong Shen
5f67be4fa3 test(raft-sim-conformance): conformance Restart persistence test (task 4.3) 2026-06-24 14:05:19 +00:00
Rongsong Shen
e15bbf8190 feat(raft-sim-conformance): seeded scheduler raft_sim_step + per-step invariant check (task 4.2) 
Harness surfaced a real upstream raft.c split-brain bug (bug-1095/1096,
bug-851 family) in raft_on_vote_reply: counter-based vote tally double-counts
a duplicated vote-response and no stale-term drop -> two leaders same term.
Out of this spec's boundary (raft.c protocol); recorded as Implementation Note.
 2026-06-24 13:37:03 +00:00
Rongsong Shen
90e7e9c999 feat(raft-sim-conformance): action trace recorder + raft_sim_dump_trace (task 4.1) 2026-06-24 13:10:31 +00:00
Rongsong Shen
f0be46fb32 feat(raft-sim-conformance): raft_sim_check_all first-failure composition (task 3.5) 2026-06-24 13:00:10 +00:00
Rongsong Shen
a38d9a7271 feat(raft-sim-conformance): State Machine Safety invariant checker (task 3.4) 2026-06-24 12:51:58 +00:00
Rongsong Shen
63a9740c85 feat(raft-sim-conformance): Leader Completeness invariant checker (task 3.3) 2026-06-24 12:44:18 +00:00
Rongsong Shen
d9b5fd51e0 test(raft-sim-conformance): focused Log Matching checker test for R3.2 (task 3.2) 2026-06-24 12:35:36 +00:00
Rongsong Shen
25b14a6dca feat(raft-sim-conformance): Election Safety invariant checker (task 3.1) 2026-06-24 12:28:16 +00:00
Rongsong Shen
b450e60d13 feat(raft-sim-conformance): bag-only Drop/Duplicate/Reorder ops (task 2.2) 2026-06-24 12:19:15 +00:00
Rongsong Shen
ae4495104a feat(raft-sim-conformance): bag push/deliver routes vote+AE RPCs through library handlers (task 2.1) 2026-06-24 12:10:11 +00:00
Rongsong Shen
631854303c feat(raft-sim-conformance): seeded PRNG + in-memory adapter callbacks + conformance init (task 1.2) 2026-06-24 11:55:11 +00:00
Rongsong Shen
35c012ddc2 feat(raft-sim-conformance): add conformance-harness data types to raft.h (task 1.1) 2026-06-24 11:40:38 +00:00
Rongsong Shen
20e59d0b42 checkpoint: bug-851 root cause + raft TLA+ conformance spec family 
Investigation & fixes (failover committed-job loss):
- root-cause bug-851 on an owned 3-node cluster: chaotic failover causes
  silent committed-prefix divergence (WAL hdr.term always 0; two leaders
  per term; no (term,lsn) reconcile). Evidence in repro-851/ + INVESTIGATION.
- live-validated fixes 848/849/850 (recovery-on-promotion, advertise real
  applied_lsn, persist-layer contiguity guard); add waldump WAL inspector.

Specs (strict raft.tla conformance — library owns the log):
- TLA-gap-analysis.md: impl vs raft/raft.tla, gaps G1-G6.
- raft-log-replication, raft-commit-safety, raft-sim-conformance: extend
  src/lib/raft to own log/commit/verification via callbacks (specs generated,
  cross-spec review passed).
- ha-term-safety: controller-side adapter + config marker (R1-R7); design done.
- config-upgrade-snapshot: R8 descoped here (deps entity-bearing-snapshots, bug-857).
- roadmap + buglog (851/854/857) + .wolf knowledge updated.
 2026-06-21 14:02:15 +00:00