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feat(worker-rejoin-resync): reconciliation round lifecycle (task 3.1)

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New src/controller/resync.c/resync.h: resync_arm_round(cluster_t*,
worker_t*) enumerates every non-terminal job assigned to a host,
populates worker_t.resync (round_token, query job-ID set, deadline),
sets XCE_WORKER_RECONCILING, and schedules a non-blocking delaymgr
one-shot timeout. resync_resolve_round() clears the round; a fired
timeout resolves it too, via resync_round_is_current()'s by-value
round-token check -- delay.c/delay.h expose no true cancel/dequeue
primitive, so a stale timer from an already-superseded round becomes a
safe no-op instead of touching a newer round's live state (verified
safe against both misresolving the wrong round and use-after-free: the
timeout closure never holds a pointer into resync_state_t itself).

5 new tests: query-set correctness, fresh-token-per-arm, the
RECONCILING flag's set/clear lifecycle, and a direct (non-blocking)
timeout-fire proof via an XCE_TESTING-gated seam confirmed compiled out
of the production binary. Full suite: 1232 tests, 0 failures.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y4M5MJM2zK6nU43da267Ku
This commit is contained in:
Rongsong Shen 2026-09-01 12:53:09 +00:00
parent ea0658ecf4
commit 442fcf4544
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5 changed files with 927 additions and 1 deletions
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src/controller/meson.build
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@ -27,6 +27,7 @@ controller_src = [
'repl.c',
'ctrl_metrics.c',
'slowlane.c',
'resync.c',
]
incdir = include_directories('.', '../include', '../lib',
@ -214,6 +215,7 @@ controller_unit_test_src = [
'config_repl.c',
'slowlane.c',
'cluster.c',
'resync.c',
]
ssl_dep = dependency('openssl')