1.1: WalCatchupEntry gains term@4/prevLogIndex@5/prevLogTerm@6 (append-only).
1.2: RequestVote/PreVote gain lastLogTerm@4/lastLogIndex@5; cluster.c vote callers
fixed to the extended library arity (RESTORES xce_controller + controller_unit_test
compile+link, broken by the raft-commit-safety signature extension); ha.c emits the
candidate's last-log tuple on send.
5 minimal stub log/commit callbacks wired into s_real_cbs so raft_init's new
non-NULL requirement is satisfied — tasks 2.x replace them with real bodies; the
logOk freshness gate is inert until the term seam (1.3) + on_get_entry_term (2.2).
Pre-existing test_repl_unit.c wal_catchup -EAGAIN failures + ASAN leaks are an
overlayfs /tmp fsync env artifact (bug-850), not from this task (untouched paths;
append-only schema cannot affect the @3 entries-list decode). Build/baseline
isolation is blocked by a c-capnproto flake-hash drift — see Implementation Notes.
Three scenario tests (zero production change): a stale-heartbeat standby GRANTS
(grant<->deny flip vs 5.2) and the won round advances to CTRL_ELECTING (PreVote
does not block legitimate failover); a heartbeat mid-round cancels and re-attaches
as standby with term unchanged; a lost round re-arms liveness and a later genuine
failure still wins (reusable, not one-shot).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Two-angle scenario test (zero production change): a healthy PRIMARY and a
fresh-heartbeat STANDBY both DENY a higher-prospective-term preVoteRequest
without adopting the term or demoting; and a resumed standby whose round both
peers deny gets no majority -> stays CTRL_STANDBY/FOLLOWER, term byte-for-byte
unchanged, liveness re-armed. Regresses if the disruptive-server bug returns.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
peer_ctrl_msg_handler gains a CTRL_STANDBY + pre_vote_in_progress branch that
decodes an incoming preVoteReply (no term adoption) and feeds it to
pre_vote_reply_dispatch with the absolute peer index, paralleling the real-vote
reply path. Gives pre_vote_reply_dispatch its production caller (drops the used
attribute). STANDBY-no-round still drops; ELECTING/PRIMARY routing unchanged.
PreVote now drives rounds to a decision end-to-end over the wire.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
