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6b5b201a64
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feat(raft-log-replication): header contract — log model, callbacks, entry points (tasks 1.1-1.3)
Extend src/lib/raft/raft.h for the TLA+ log half (raft.tla logVars/leaderVars):
- raft_state_t: log_len, next_index[], match_index[] (no entry bytes stored —
terms via on_get_entry_term, bytes in the adapter); raft_config_t.initial_log_len.
- raft_callbacks_t: 4 REQUIRED log callbacks on_persist_entry, on_get_entry_term,
on_send_append_entries, on_truncate_from.
- Entry points + raft_append_result_t: raft_log_append (ClientRequest),
raft_send_append_entries (AppendEntries emit), raft_on_append_entries_request
(Handle + UpdateTerm-first), raft_on_append_entries_reply.
Concretized on_send_append_entries's varargs "entries handle" placeholder to an
explicit n_entries (0/1); design.md updated to match. Header compiles clean with
and without XCE_TESTING (-Wall -Wextra -fsyntax-only).
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2026-06-21 14:15:15 +00:00 |
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20e59d0b42
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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.
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2026-06-21 14:02:15 +00:00 |
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