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fix(raft-apply-decoupling): bug-1419 layer 2 — checkpoint_lsn mislabeled from WAL tip instead of applied cursor

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persist_checkpoint() stamped checkpoint_lsn from p->current_lsn (physical
WAL append tip) instead of p->last_applied_lsn (the true "jobmgr reflects
up through here" cursor), uncoordinated with the async apply pump
introduced by raft-apply-decoupling. write_snapshot() serializes live
jobmgr state, so a checkpoint taken while apply lags the WAL tip mislabels
the snapshot: on restart last_applied_lsn is re-seeded from checkpoint_lsn
and replay resumes strictly above it, silently skipping committed-but-not-
yet-applied entries jobmgr never received. This is the actual mechanism
behind kill-mid-apply producing a permanent APPLY_DIVERGENT fence —
apply_committed_entry() is deterministic/idempotent and write_snapshot()
is crash-atomic, so the bug was a mislabeled watermark, not a structural
divergence requiring a safety/liveness tradeoff.

Fix stamps checkpoint_lsn from last_applied_lsn and holds apply_pump_lock
across the label capture + write_snapshot() so the label and the jobmgr
state it describes are captured atomically w.r.t. the live apply pump.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VgT3n4vTv4ZjCuCTmzed1F
This commit is contained in:
Rongsong Shen 2026-07-08 00:05:19 +00:00
parent fe4352fb36
commit 0eb105431b
4 changed files with 292 additions and 9 deletions
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208
.wolf/memory.md
View file

@ -3641,3 +3641,211 @@
| 00:50 | Task 7.2 round-2 fixes complete: (1) fixed phantom-check `started` derivation in run-ha-soak.sh to check WAL_JOB_START presence directly instead of inferring from terminal state bits (real false-positive, proven via manual jfail-without-jstart repro against a live cluster); (2) root-caused+fixed bug-1416 with new persist_t.recovery_complete gate (persist.h/persist.c) closing persist_apply_pump_kick + ha_apply_single_entry/ha_apply_term_entry_via_library's in-memory apply during boot-time persist_recover(), PLUS persist_mark_recovery_pending() wired into myapp_run() (closes a live-verification-discovered gap: election-retry candidates apply live traffic before persist_recover() is ever first called). Verified: live 3-node --factstream soak PASS (2 rounds, kill+restart both, zero APPLY_DIVERGENT across 5 persist_recover calls); controller_unit_test 23-group sweep zero new failures (2 pre-existing task-6.1/6.2 FAILs unchanged); real-divergence fence tests still PASS | src/include/persist.h, src/controller/persist.c, src/controller/ha.c, src/controller/myapp.c, .claude/skills/xce-test-ha/run-ha-soak.sh | GREEN | ~9000 |
| 00:51 | Session end: 48 writes across 12 files (jun29-jul04-2026.md, raft_sim.c, tasks.md, test.c, waldump.c) | 28 reads | ~389364 tok |
| 05:07 | Session end: 48 writes across 12 files (jun29-jul04-2026.md, raft_sim.c, tasks.md, test.c, waldump.c) | 30 reads | ~407960 tok |
| 08:10 | Edited .claude/skills/xce-build/SKILL.md | 3→4 lines | ~22 |
| 08:10 | Edited .claude/skills/xce-deploy-ha/SKILL.md | 2→3 lines | ~56 |
| 08:10 | Edited .claude/skills/xce-test-ha/SKILL.md | 2→3 lines | ~70 |
| 08:11 | Session end: 51 writes across 12 files (jun29-jul04-2026.md, raft_sim.c, tasks.md, test.c, waldump.c) | 32 reads | ~408119 tok |
| 08:14 | Edited .claude/skills/xce-deploy-ha/SKILL.md | 2→3 lines | ~8 |
| 08:14 | Edited .claude/skills/xce-test-ha/SKILL.md | 2→3 lines | ~8 |
| 08:15 | Session end: 53 writes across 12 files (jun29-jul04-2026.md, raft_sim.c, tasks.md, test.c, waldump.c) | 32 reads | ~408137 tok |
## Session: 2026-07-06 20:39
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
## Session: 2026-07-06 20:54
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
## Session: 2026-07-06 21:02
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
## Session: 2026-07-06 00:50
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
| 01:55 | Created .kiro/specs/admin-config-tool/spec.json | — | ~135 |
| 01:55 | Created .kiro/specs/admin-config-tool/brief.md | — | ~2639 |
| 01:56 | Edited .kiro/steering/roadmap.md | "OP_upgradeConfig" → "/kiro-discovery" | ~425 |
| 01:56 | Edited .kiro/steering/roadmap.md | 6→8 lines | ~571 |
| 01:57 | Edited .kiro/steering/roadmap.md | expanded (+9 lines) | ~295 |
| 01:58 | Session end: 5 writes across 3 files (spec.json, brief.md, roadmap.md) | 32 reads | ~87853 tok |
| 02:03 | Session end: 5 writes across 3 files (spec.json, brief.md, roadmap.md) | 32 reads | ~87853 tok |
| 02:57 | Edited .kiro/specs/admin-config-tool/brief.md | expanded (+13 lines) | ~415 |
| 02:58 | Edited .kiro/specs/admin-config-tool/brief.md | expanded (+43 lines) | ~531 |
| 03:00 | Session end: 7 writes across 3 files (spec.json, brief.md, roadmap.md) | 32 reads | ~89042 tok |
| 03:07 | Session end: 7 writes across 3 files (spec.json, brief.md, roadmap.md) | 32 reads | ~94392 tok |
| 03:08 | Edited .kiro/specs/admin-config-tool/brief.md | 5→6 lines | ~51 |
| 03:09 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~78 |
| 03:09 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~34 |
| 03:09 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~28 |
| 03:09 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~45 |
| 03:09 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~55 |
| 03:10 | Edited .kiro/specs/admin-config-tool/brief.md | 6→4 lines | ~45 |
| 03:10 | Session end: 14 writes across 3 files (spec.json, brief.md, roadmap.md) | 32 reads | ~94751 tok |
| 03:11 | Edited .kiro/specs/admin-config-tool/brief.md | list() → dev() | ~68 |
| 03:12 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~92 |
| 03:12 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~53 |
| 03:12 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~78 |
| 03:12 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~40 |
| 03:12 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~23 |
| 03:12 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~38 |
| 03:12 | Edited .kiro/specs/admin-config-tool/brief.md | inline fix | ~55 |
| 03:12 | Edited .kiro/specs/admin-config-tool/brief.md | "--cert" → "localhost:9991" | ~56 |
| 03:13 | Session end: 23 writes across 3 files (spec.json, brief.md, roadmap.md) | 32 reads | ~90437 tok |
| 03:15 | Edited .kiro/steering/roadmap.md | 2→3 lines | ~560 |
| 03:15 | Edited .kiro/steering/roadmap.md | inline fix | ~451 |
| 03:16 | Session end: 25 writes across 3 files (spec.json, brief.md, roadmap.md) | 32 reads | ~91860 tok |
| 03:18 | Edited .kiro/steering/roadmap.md | inline fix | ~433 |
| 03:18 | Session end: 26 writes across 3 files (spec.json, brief.md, roadmap.md) | 32 reads | ~92348 tok |
## Session: 2026-07-06 03:33
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
| 04:00 | Created .kiro/specs/scheduler-framework/brief.md | — | ~2749 |
| 04:00 | Edited .kiro/specs/scheduler-framework/brief.md | modified Deferred() | ~831 |
| 04:01 | Edited .kiro/steering/roadmap.md | "/kiro-spec-init " → "/kiro-discovery" | ~175 |
| 04:01 | Edited .kiro/steering/roadmap.md | 3→4 lines | ~131 |
| 04:03 | Session end: 4 writes across 2 files (brief.md, roadmap.md) | 15 reads | ~20186 tok |
## Session: 2026-07-07 19:29
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
## Session: 2026-07-07 19:53
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
## Session: 2026-07-07 19:55
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
| 20:02 | Edited .kiro/specs/raft-apply-decoupling/tasks.md | inline fix | ~24 |
| 20:03 | Edited .kiro/specs/raft-apply-decoupling/tasks.md | added error handling | ~1233 |
| 20:09 | Session end: 2 writes across 1 files (tasks.md) | 3 reads | ~35904 tok |
| 20:16 | Edited src/controller/testsuite/test_commit_barrier_reply.c | modified 2() | ~1068 |
| 20:18 | Edited src/controller/testsuite/test_commit_barrier_reply.c | added error handling | ~1371 |
| 20:19 | Created ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/run_all_groups.sh | — | ~301 |
| 20:24 | Session end: 5 writes across 3 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh) | 8 reads | ~170866 tok |
| 20:37 | Edited .kiro/specs/raft-apply-decoupling/tasks.md | inline fix | ~29 |
| 20:37 | Edited .kiro/specs/raft-apply-decoupling/tasks.md | modified Verified() | ~514 |
| 20:39 | Session end: 7 writes across 3 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh) | 8 reads | ~171764 tok |
| 20:51 | Created ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/factstream-throughput-bench.sh | — | ~1170 |
| 20:55 | Edited ../../xce/.claude/worktrees/agent-a0dfba18c450e4f5f/src/controller/testsuite/test.c | modified 4() | ~290 |
| 20:56 | Edited ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/factstream-throughput-bench.sh | 6→6 lines | ~82 |
| 20:56 | Edited ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/factstream-throughput-bench.sh | inline fix | ~7 |
| 21:21 | Edited ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/factstream-throughput-bench.sh | modified used() | ~277 |
| 21:21 | Edited ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/factstream-throughput-bench.sh | expanded (+7 lines) | ~189 |
| 21:22 | Edited ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/factstream-throughput-bench.sh | added 1 condition(s) | ~636 |
| 21:31 | Edited ../../xce/.claude/worktrees/agent-a0dfba18c450e4f5f/src/controller/testsuite/test.c | modified 4() | ~290 |
| 21:47 | Edited ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/factstream-throughput-bench.sh | "$XT" → "${XTEST_TIMEOUT:-180}" | ~23 |
| 22:06 | Session end: 16 writes across 5 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh, factstream-throughput-bench.sh, test.c) | 13 reads | ~269734 tok |
| 22:12 | Session end: 16 writes across 5 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh, factstream-throughput-bench.sh, test.c) | 14 reads | ~290165 tok |
| 22:16 | Edited src/include/persist.h | modified XCE_TESTING() | ~430 |
| 22:16 | Edited src/controller/persist.c | modified idle() | ~174 |
| 22:16 | Edited src/controller/persist.c | added 1 condition(s) | ~178 |
| 22:17 | Edited src/controller/persist.c | added 1 condition(s) | ~222 |
| 22:17 | Edited src/controller/persist.c | added 8 condition(s) | ~875 |
| 22:17 | Edited src/controller/persist.c | added 1 condition(s) | ~364 |
| 22:17 | Edited src/controller/persist.c | added 2 condition(s) | ~258 |
| 22:44 | Session end: 23 writes across 7 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh, factstream-throughput-bench.sh, test.c) | 14 reads | ~292845 tok |
| 22:51 | Created ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/factstream-throughput-bench-v2.sh | — | ~1576 |
| 23:12 | Created ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/bench-v3.sh | — | ~843 |
| 23:14 | Created ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/bench-v4.sh | — | ~992 |
| 23:16 | Edited ../../../../../../tmp/claude-1000/-home-rshen-projects-xce-worktrees-raft-tla/5e55cf26-d05d-4a2e-8196-d2c70e0c063c/scratchpad/bench-v4.sh | added 1 condition(s) | ~478 |
| 06:43 | Fixed apply-pump O(n^2) regression (persist.c/.h): segment-lookup cache in apply_pump_read_entry, invalidated on init/fini/recover/truncate | src/controller/persist.c, src/include/persist.h | tests green (5/5,4/4,11/11 + broader sweep); live A/B: prefix 7.4x elapsed for 2x volume -> fixed 1.46x, throughput 1111->3831/s @N=2000 | ~4500 |
| 23:44 | Session end: 27 writes across 10 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh, factstream-throughput-bench.sh, test.c) | 15 reads | ~297012 tok |
| 00:02 | Session end: 27 writes across 10 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh, factstream-throughput-bench.sh, test.c) | 17 reads | ~299090 tok |
| 00:03 | Edited src/controller/persist.c | modified fix() | ~362 |
| 00:03 | Edited src/include/persist.h | added error handling | ~599 |
| 07:05 | Round-2 remediation for task 7.4 O(n^2) apply-pump review rejection: (1) wrapped persist_recover cache-invalidation in apply_pump_lock/unlock to match persist_truncate_wal_above and persist.h doc invariant, (2) added accepted-tradeoff doc comment on trim_wal_segments/cache interaction (deferred loud-fence via APPLY_DIVERGENT, not immediate -ENOENT) | src/controller/persist.c, src/include/persist.h | build OK, test_apply_pump 5/5, test_apply_pump_integration 4/4, test_persist_recovery 7/7, test_persist_truncate 8/8 | ~1800 |
| 00:06 | Session end: 29 writes across 10 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh, factstream-throughput-bench.sh, test.c) | 17 reads | ~300119 tok |
| 00:13 | Edited .kiro/specs/raft-apply-decoupling/tasks.md | inline fix | ~23 |
| 00:13 | Edited .kiro/specs/raft-apply-decoupling/tasks.md | added error handling | ~1465 |
| 00:14 | Edited .kiro/specs/raft-apply-decoupling/tasks.md | inline fix | ~19 |
| 00:16 | Session end: 32 writes across 10 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh, factstream-throughput-bench.sh, test.c) | 19 reads | ~320484 tok |
| 00:24 | Session end: 32 writes across 10 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh, factstream-throughput-bench.sh, test.c) | 21 reads | ~323424 tok |
| 00:26 | Session end: 32 writes across 10 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh, factstream-throughput-bench.sh, test.c) | 21 reads | ~323424 tok |
| 01:40 | Edited .kiro/steering/roadmap.md | inline fix | ~568 |
| 01:41 | Edited .kiro/specs/raft-drive-async/tasks.md | inline fix | ~19 |
| 01:42 | Edited .kiro/specs/raft-drive-async/tasks.md | inline fix | ~16 |
| 01:42 | Edited .kiro/specs/raft-drive-async/tasks.md | inline fix | ~26 |
| 01:42 | Edited .kiro/specs/raft-drive-async/tasks.md | inline fix | ~17 |
| 01:47 | Edited .kiro/specs/raft-apply-decoupling/design.md | inline fix | ~166 |
| 01:47 | Edited .kiro/specs/raft-apply-decoupling/design.md | "src/controller/ha.c" → "s trigger into " | ~182 |
| 01:48 | Edited .kiro/specs/raft-apply-decoupling/design.md | 3→4 lines | ~234 |
| 01:48 | Edited .kiro/specs/raft-apply-decoupling/tasks.md | modified exception() | ~252 |
| 01:49 | Session end: 41 writes across 12 files (tasks.md, test_commit_barrier_reply.c, run_all_groups.sh, factstream-throughput-bench.sh, test.c) | 23 reads | ~345020 tok |
## Session: 2026-07-07 02:06
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
| 07:36 | xce-test-ha 10-round chaotic soak launched | run-ha-soak.sh --chaotic | IN_PROGRESS (round 4/10 running) | ~15 min estimated |
| 02:34 | Created ../../../../../claude/.claude/projects/-home-rshen-projects-xce-xce/memory/project_bug1417_vote_index_mapping.md | — | ~815 |
| 02:34 | Edited ../../../../../claude/.claude/projects/-home-rshen-projects-xce-xce/memory/MEMORY.md | 1→2 lines | ~106 |
| 02:35 | Session end: 2 writes across 2 files (project_bug1417_vote_index_mapping.md, MEMORY.md) | 4 reads | ~103293 tok |
| 02:50 | Edited src/controller/testsuite/test_ha_vote_send.c | modified make_three_node_self1() | ~1488 |
| 02:51 | Edited src/controller/ha.c | expanded (+17 lines) | ~501 |
| 03:20 | Session end: 4 writes across 4 files (project_bug1417_vote_index_mapping.md, MEMORY.md, test_ha_vote_send.c, ha.c) | 8 reads | ~123006 tok |
| 03:21 | Session end: 4 writes across 4 files (project_bug1417_vote_index_mapping.md, MEMORY.md, test_ha_vote_send.c, ha.c) | 8 reads | ~123006 tok |
| 03:52 | Session end: 4 writes across 4 files (project_bug1417_vote_index_mapping.md, MEMORY.md, test_ha_vote_send.c, ha.c) | 8 reads | ~123322 tok |
| 04:23 | Session end: 4 writes across 4 files (project_bug1417_vote_index_mapping.md, MEMORY.md, test_ha_vote_send.c, ha.c) | 8 reads | ~123322 tok |
| 06:13 | Created ../../../../../claude/.claude/projects/-home-rshen-projects-xce-xce/memory/project_bug1418_term_desync_apply_divergent.md | — | ~772 |
| 06:13 | Edited ../../../../../claude/.claude/projects/-home-rshen-projects-xce-xce/memory/MEMORY.md | 1→2 lines | ~90 |
| 06:13 | Session end: 6 writes across 5 files (project_bug1417_vote_index_mapping.md, MEMORY.md, test_ha_vote_send.c, ha.c, project_bug1418_term_desync_apply_divergent.md) | 8 reads | ~124246 tok |
| 06:30 | Edited .claude/skills/xce-test-ha/run-ha-soak.sh | modified start_node() | ~286 |
| 07:03 | Edited src/controller/job.c | added 4 condition(s) | ~1436 |
| 07:04 | Edited src/controller/job.c | modified jobsubmit_async_ctx_release() | ~405 |
| 07:05 | Edited src/controller/job.c | added 1 condition(s) | ~515 |
| 07:06 | Edited src/controller/job.c | modified cannot() | ~263 |
| 07:06 | Edited src/controller/job.c | added 1 condition(s) | ~557 |
| 07:07 | Edited src/controller/job.c | modified if() | ~169 |
| 07:12 | Edited src/controller/testsuite/test_commit_barrier_reply.c | modified test_jobsubmit_resubmit_before_resolution_rejected_no_dup_wal_entry() | ~1108 |
| 07:12 | Edited src/controller/testsuite/test_commit_barrier_reply.c | 6→5 lines | ~54 |
| 07:12 | Edited src/controller/testsuite/test_commit_barrier_reply.c | 4→3 lines | ~39 |
| 07:13 | Edited src/controller/testsuite/test_commit_barrier_reply.c | 2→3 lines | ~63 |
## Session: 2026-07-07 07:19
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
| 07:22 | Edited src/controller/job.c | modified XCE_TESTING() | ~426 |
| 07:23 | Edited src/controller/include/cluster.h | modified XCE_TESTING() | ~149 |
| 07:23 | Edited src/controller/testsuite/test_commit_barrier_reply.c | modified cbrp_teardown() | ~159 |
| 07:24 | Edited src/controller/testsuite/test_commit_barrier_reply.c | 3→3 lines | ~40 |
| 07:24 | Edited src/controller/testsuite/test_commit_barrier_reply.c | 4→9 lines | ~99 |
| 07:31 | bug-1419 fix committed: in-flight jobid registry in job.c closes resubmit-dedup gap | src/controller/job.c, cluster.h, test_commit_barrier_reply.c, buglog.json | 78-group sweep 782/782 pass, commit fe4352f | ~9000 |
| 07:30 | Session end: 5 writes across 3 files (job.c, cluster.h, test_commit_barrier_reply.c) | 8 reads | ~205492 tok |
| 07:32 | Session end: 5 writes across 3 files (job.c, cluster.h, test_commit_barrier_reply.c) | 9 reads | ~205492 tok |
| 08:10 | Session end: 5 writes across 3 files (job.c, cluster.h, test_commit_barrier_reply.c) | 9 reads | ~205492 tok |
| 08:12 | Session end: 5 writes across 3 files (job.c, cluster.h, test_commit_barrier_reply.c) | 9 reads | ~205492 tok |
| 08:19 | Session end: 5 writes across 3 files (job.c, cluster.h, test_commit_barrier_reply.c) | 9 reads | ~205492 tok |
| 08:28 | Session end: 5 writes across 3 files (job.c, cluster.h, test_commit_barrier_reply.c) | 12 reads | ~285133 tok |
## Session: 2026-07-07 16:47
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
## Session: 2026-07-07 16:48
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
## Session: 2026-07-07 16:53
| Time | Action | File(s) | Outcome | ~Tokens |
|------|--------|---------|---------|--------|
| 17:00 | Edited src/controller/persist.c | expanded (+20 lines) | ~543 |
| 17:01 | Edited src/controller/testsuite/test_persist_checkpoint.c | modified test_checkpoint_sets_checkpoint_lsn() | ~842 |
| 17:01 | Edited src/controller/testsuite/test_persist_checkpoint.c | 1→2 lines | ~33 |
| 17:02 | Edited src/controller/testsuite/test_persist_checkpoint.c | 10→11 lines | ~140 |
| 17:15 | bug-1419 layer 2 FIXED: persist_checkpoint() stamped checkpoint_lsn from current_lsn (WAL tip) not last_applied_lsn (applied cursor), uncoordinated with async apply pump -> kill-mid-apply permanently skipped committed-not-yet-applied entries on recovery, false APPLY_DIVERGENT fence | persist.c, test_persist_checkpoint.c, buglog.json | RED->GREEN confirmed via stash/pop; 78-group/782-test sweep 0 failures | ~11000 |