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Server exits with "storage writer lease was not renewed before its safety deadline" under light load

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@lavaman131 已经在做这个了。

开始于 2026年10月12日。

  • #487 来自 @lavaman131 —— 未关闭

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描述

What happened

A self-hosted Chopin server (Postgres storage, HARNESS=remote, running in Docker with restart: unless-stopped) exited on its own and was restarted by Docker:

2026-10-12T00:45:06.381Z chopin: storage writer lease was not renewed before its safety deadline
2026-10-12T00:45:07.642Z chopin: postgres storage is up to date
2026-10-12T00:45:08.628Z chopin  ·  http://0.0.0.0:8787  ·  … harness: remote … storage: postgres

docker inspect: StartedAt=2026-10-12T00:45:07.42Z, RestartCount=1, ExitCode=0, OOMKilled=false. No other error was logged before the exit.

Effects: every open WebSocket (rooms, /planner-link) closed with 1006 at the same moment. Attached Planner clients reconnected after the restart, but their in-flight turns failed, and attachments were released.

Context

  • Server at main 518bd44 (Atomic 0.9.34), on a 16-vCPU VM. The database is an Azure PostgreSQL Flexible Server (zone-redundant HA) on the same VNet.
  • Load was light: one attached Planner client actively streaming a turn (about 700 KB queued on its socket at the time) and one browser.
  • The message comes from the writer-lease watchdog in apps/server/src/main.ts, which exits when a lease renewal hasn't completed before its safety deadline.

Questions / expected

  • What can delay a lease renewal past its deadline under light load? For example, event-loop blocking while serializing large Planner-link frames, a slow or stalled Postgres round-trip, or a renewal request that hangs with no timeout.
  • Expected: a transient renewal delay shouldn't take the whole server down when no other writer exists. Or, if exiting is the safe choice, it should log the renewal's last success time, how late it was, and the failing query or error, so the cause can be diagnosed.
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环境准备

  • 提供 Dockerfile 或 Docker Compose 文件
  • 没有 Pull Request 模板
  • 没有贡献指南

从这里开始

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  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库，在一个分支上完成修改。
  4. 提交 Pull Request，并在描述里引用这个 Issue 编号。

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