Zero-downtime server restarts and updates (requests hang during a deploy) #111
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opened 2026-10-08 17:06:16 +00:00 by kayg
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kayg/infraternal#111
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Owner saw ERR_CONNECTION_TIMED_OUT on infraternal.kayg.org right after a web deploy (2026-10-08 ~17:05 CEST), which restarts the server; sessions survive (shims stay up) but requests during the restart window can hang. Make restarts and updates zero-downtime for HTTP: socket handover to the new process (systemd socket activation or passing the listening fd), or the proxy retrying idempotent requests; the new process must be ready before the old one stops accepting. Also: on stop, systemd reports 'infraternal agent failed: unexpected end of file' and that a unit process remained running; check the embedded agent subprocess's shutdown (KillMode, graceful EOF handling). Relates to D155/D185 updates (#102).
kayg referenced this issue2026-10-28 17:53:56 +00:00