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feat(controller-status): carry election time on the heartbeat (task 7.3)

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The primary echoes its own last_known_elected_at_ms on every outgoing
heartbeat (threaded through xce_ha_heartbeat_req's existing scalar-arg
plumbing, alongside term/committed_lsn/committed_config_tag); a standby
processing a received heartbeat (ha_consume_heartbeat_committed, the sole
production call site) stores it unconditionally into its own
last_known_elected_at_ms, reconcile-free -- no other HA field moves.
ha_observe_heartbeat_committed itself is untouched; the new store sits
next to its call site, not inside it.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RLSNJhNoULvVcUhXEFafQC
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Rongsong Shen 2026-09-16 06:03:03 +00:00
parent 21ae00b375
commit 30adc52ea3
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9 changed files with 252 additions and 33 deletions
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11
src/include/request.h
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@ -27,12 +27,15 @@ extern int xce_reply(endpoint_t*, xce_peerinfo_t*, xce_reply_t*);
extern int xce_hello_req(endpoint_t*, char*);
extern int xce_nop_req(endpoint_t*);
/* HA heartbeat: an OP_nop request carrying a HeartbeatMsg body with the
* primary's committed position. Non-blocking, no reply awaited (the standby's
* StateReport rides the normal nop reply). senderPriority is unused (0).
* Generic xce_nop_req is left unchanged (body-less). */
* primary's committed position and its own election time (Req 12.2 — echoed
* to standbys so they can learn the currently-known primary's election
* time). Non-blocking, no reply awaited (the standby's StateReport rides the
* normal nop reply). senderPriority is unused (0). Generic xce_nop_req is
* left unchanged (body-less). */
extern int xce_ha_heartbeat_req(endpoint_t* ep, uint64_t term,
uint64_t committed_lsn,
uint64_t committed_config_tag);
uint64_t committed_config_tag,
uint64_t elected_at_ms);
extern int xce_shutdown_req(endpoint_t*);
extern void init_reply_by_req(xce_reply_t*, xce_request_t*);
extern int xce_join_req(endpoint_t*, int, hostattrs_t*);