Files
claude-plugins-official/external_plugins
Noah Zweben 58578a456a fix(telegram): prevent zombie pollers from blocking new sessions with 409 Conflict (#1349)
* fix(telegram): prevent zombie pollers from blocking new sessions

The MCP server runs as a grandchild of the CLI (via `bun run start` →
shell → `bun server.ts`). When the CLI is killed uncleanly (SIGKILL,
crash, terminal close), the grandchild survives as an orphan and keeps
long-polling getUpdates indefinitely. Telegram allows only one consumer
per token, so every subsequent session sees 409 Conflict and the
existing retry loop spins forever.

Three layered mitigations:

- PID lockfile (STATE_DIR/bot.pid): on startup, SIGTERM any stale holder
  before claiming the slot, so a fresh session always wins.
- Orphan watchdog: every 5s check for parent reparenting (POSIX ppid
  change) or a dead stdin pipe, and self-terminate. Covers cases where
  the existing stdin end/close events never fire through the wrapper.
- 409 retry cap: give up after 8 attempts (~28s) instead of looping
  forever, and bail immediately if shutdown has begun.

Also adds a SIGHUP handler and removes the pidfile on clean shutdown
(only if still owned by this process).

* chore(telegram): bump version to 0.0.5

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Co-authored-by: Claude <noreply@anthropic.com>
2026-04-10 12:01:01 -07:00
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