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7338309807
The Telegram adapter's connect retry loop could silently stall after
'Connecting to Telegram (attempt 1/8)...' with the event loop permanently
parked in select() — all threads idle, no attempt 2/8 ever scheduled.
Root cause analysis:
- The retry loop reused the same Application object across all
8 attempts. After a failed initialize() the app could be in a partially-
initialized state (closed httpx transports from ,
or flag set before the hang) causing subsequent calls
to silently skip real initialization.
- CancelledError (a BaseException, not an Exception) propagated silently
through all except handlers with no logging — the task driving the retry
loop could exit without any trace.
- No total watchdog bound existed for the entire retry loop; only per-attempt
timeouts via _await_with_thread_deadline. If the loop itself stalled
between attempts (between-attempt sleep, cleanup, or scheduling), there
was no timeout to catch it.
Fixes:
1. **Total watchdog deadline**: Compute a total deadline for the entire
connect loop (8 attempts × init_timeout + 120s margin). Before each
attempt, check the wall clock; if exceeded, raise OSError immediately
instead of attempting another initialize().
2. **Fresh Application per retry**: On each failed attempt, rebuild
via and re-register all handlers. The old
app is best-effort shutdown with . This ensures
each retry starts with a clean slate — no stale transports, no stale
flag, no leaked state from the previous attempt.
3. **BaseException logging + propagation**: Added
(placed LAST after all other handlers) to log CancelledError and other
non-Exception signals before propagating. Previously these exited the
retry loop silently with no log message.
4. ** block for app rebuild**: The clause runs after
every failed attempt that isn't the last, rebuilding the app and
discarding the old one regardless of which exception class caused the
failure.
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|---|---|---|
| .. | ||
| dingtalk | ||
| discord | ||
| feishu | ||
| google_chat | ||
| homeassistant | ||
| irc | ||
| line | ||
| matrix | ||
| mattermost | ||
| ntfy | ||
| photon | ||
| raft | ||
| simplex | ||
| slack | ||
| sms | ||
| teams | ||
| telegram | ||
| wecom | ||