48 lines
2.2 KiB
Markdown
48 lines
2.2 KiB
Markdown
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# Reproduction: Chat UI stops updating until the desktop app is restarted (#2638)
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Reproduces https://github.com/openchamber/openchamber/issues/2638 using the
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real server modules (`lifecycle.js`, `global-hub.js`, `network-runtime.js`),
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real processes, and real ports — no mocks.
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## Run
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```sh
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# Windows-orphan scenario (the reported bug):
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node scripts/repro/issue-2638/reproduce-2638.mjs
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# Control: healthy restart on Linux (hub reconnects, UI keeps updating):
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node scripts/repro/issue-2638/reproduce-2638.mjs --baseline
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```
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Requires `lsof` (used only for cleanup). The default run simulates Windows
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(`process.platform` is temporarily overridden to `win32`) because the bug is
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specific to the Windows process-lifecycle path.
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## What it demonstrates
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1. A managed OpenCode process starts; the global message-stream hub connects to
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its `/global/event` SSE stream and chat events flow to the UI.
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2. The managed process "exits" but the actual server process survives on the
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old port (on Windows `killProcessOnPort` is a no-op and `taskkill` cannot
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reach the orphaned tree — the report shows leftover `opencode.exe serve`
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processes on historical ports).
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3. `restartOpenCode()` gives up after 5 s — logs
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`Timed out waiting for OpenCode port <old> to be released` — and spawns a
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fresh server on a NEW port, leaving the orphaned process running.
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4. HTTP/proxy traffic follows `state.openCodePort` to the new server, but the
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hub's upstream SSE reader stays pinned to the OLD server's `/global/event`
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stream (that connection never closed), so events emitted by the new server
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never reach the UI: the chat UI goes stale while the new server keeps
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persisting session data — visible only after restarting the app.
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The `--baseline` control proves the reconnect logic itself is fine: when the
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old process dies and the port is properly released, the hub reconnects to the
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new port and events are delivered.
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## Files
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- `reproduce-2638.mjs` — the reproduction driver (assertions + summary).
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- `fake-opencode-serve.mjs` — a fake `opencode serve` binary whose launcher
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spawns a detached server core that survives the launcher's death
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(Windows-style orphan), plus an in-process mode for the baseline control.
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