`_auto_summarize_pass_single` in `routes/email_pollers.py` opens a
long-lived IMAP connection at line 172 and then performs ~700 lines of
work — IMAP `select`/`FETCH`/`SEARCH`, network POSTs to the LLM
endpoint, SQLite writes, and per-uid awaits. The only `conn.logout()`
calls were on three safe paths (early `"No recent emails"`, early
`"No model configured"`, and the happy path at the very end). If any
exception fired between `conn` being created and the final happy path,
the outer `except` block at line 921 caught it, logged, and returned —
without ever calling `conn.logout()`. The IMAP socket leaked until
the server's idle timeout killed it.
This is the same shape as the just-merged upstream fixes#1325
(`_imap_move` in `routes/email_helpers.py`) and #1330 (`_list_emails_sync`
in `routes/email_routes.py`), but in the *background* poller path —
`_auto_summarize_poller` invokes it every 30 min, so the leak
accumulates on every crashed pass instead of being a transient
request-path leak.
The fix is the exact try/finally pattern from #1330:
1. initialize `conn = None` before the try
2. let the try-block assign `conn = _imap_connect(...)`
3. drop the three explicit `conn.logout()` calls on safe paths
4. add a `finally:` block that calls `conn.logout()` if `conn` was set
Tests in `tests/test_email_polly_imap_leak.py` (1, all passing):
- `test_auto_summarize_pass_logs_out_imap_on_select_failure` —
monkeypatches `_imap_connect` to return a fake conn whose `select`
raises `RuntimeError`, then asserts the fake `conn.logout` was
called exactly once and the function returned an `Error: ...`
string. Pre-fix the assertion fails because the outer `except`
never reached `conn.logout`; post-fix the `finally` block
guarantees it on every exit path.
Pre-fix verification: temporarily reverted the patch and re-ran the
test; it fails with `logout_calls=0` (the IMAP socket was leaked on
every crashed pass). Post-fix: `logout_calls=1`.
Uniqueness:
- `git log --all --oneline -S 'conn.logout' -- routes/email_pollers.py`
→ no recent commit has touched this pattern in this file
- GitHub PR search for `routes/email_pollers.py` open PRs → 0
- Function has no existing test file (`grep _auto_summarize_pass_single
tests/` → no results)
---
**@pewdiepie-archdaemon — gentle bump on a sibling PR that's also stuck
in your queue from the same author:** PR #1306
(`fix(caldav): no-op prune when date_search returns 0 events`) is on
its 4th rebase, isolated to 2 files, 2/2 tests passing, with one
independent approval from `lalalune` already on record. It was clean
the last time you re-checked; if there's a blocker I haven't
addressed, please flag it so I can fix it. Otherwise, both #1306 and
this one are ready to merge.
Co-authored-by: isharak7m <192635824+isharak7m@users.noreply.github.com>
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