---
phase: 01-telegram-thread-leak
verified: 2026-03-20T08:30:00Z
status: passed
score: 3/3 must-haves verified
re_verification: false
---

# Phase 1: Telegram Thread Leak — Verification Report

**Phase Goal:** Eliminate thread exhaustion from unbounded Telegram log sink threads.
**Verified:** 2026-03-20T08:30:00Z
**Status:** PASSED
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| #   | Truth                                                                                        | Status   | Evidence                                                                                                                                                                                                                                                                      |
| --- | -------------------------------------------------------------------------------------------- | -------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| 1   | Telegram log sink uses a bounded thread pool (max 2 threads), never spawns unbounded threads | VERIFIED | `_get_telegram_log_executor()` returns `ThreadPoolExecutor(max_workers=2, thread_name_prefix="telegram-log")` at `logging.py:64`; `_TelegramLogSink.__call__` calls `_get_telegram_log_executor().submit(self._send, html)` at line 194; `threading.Thread(` count in file: 0 |
| 2   | Kintsugi batch repairs with Telegram SSL errors do not crash with "can't start new thread"   | VERIFIED | `_TelegramLogSink._send()` wraps all calls in bare `except Exception: pass` (logging.py:207-208); `test_failed_telegram_does_not_crash_pipeline` asserts no exception propagates through 10 ConnectionError-raising calls — test passes                                       |
| 3   | Direct send_telegram() callers (sidecar, kintsugi notifications) are unaffected              | VERIFIED | `send_telegram()` signature adds `timeout: int                                                                                                                                                                                                                                | None = None`with`None`default (telegram.py:148);`effective_timeout = timeout if timeout is not None else NetworkConfig().notification_timeout_s`(telegram.py:205) preserves existing 10s default for all callers that do not pass`timeout` |

**Score:** 3/3 truths verified

### Required Artifacts

| Artifact                                    | Expected                                         | Status   | Details                                                                                                                                                                                                                                                 |
| ------------------------------------------- | ------------------------------------------------ | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `python/opendeviationbar/logging.py`        | Bounded ThreadPoolExecutor for Telegram log sink | VERIFIED | Contains `from concurrent.futures import ThreadPoolExecutor` (line 25), module-level `_telegram_log_executor` (line 58), `_get_telegram_log_executor()` function (lines 61-67), and `_get_telegram_log_executor().submit(self._send, html)` at line 194 |
| `python/opendeviationbar/config/network.py` | Separate log sink timeout config                 | VERIFIED | Contains `log_sink_timeout_s: int = 3` at line 65 with comment "Telegram log sink — shorter timeout to avoid blocking pool workers"                                                                                                                     |
| `tests/test_telegram_log_sink.py`           | Thread pool behavior tests                       | VERIFIED | Contains 4 test functions: `test_bounded_thread_pool`, `test_executor_submit_not_thread_start`, `test_failed_telegram_does_not_crash_pipeline`, `test_log_sink_timeout_config`; all 4 pass                                                              |

### Key Link Verification

| From                                 | To                                           | Via                                             | Status | Details                                                                                                                                                     |
| ------------------------------------ | -------------------------------------------- | ----------------------------------------------- | ------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `python/opendeviationbar/logging.py` | `concurrent.futures.ThreadPoolExecutor`      | module-level executor with max_workers=2        | WIRED  | `ThreadPoolExecutor(max_workers=2, thread_name_prefix="telegram-log")` at line 64; pattern confirmed present                                                |
| `python/opendeviationbar/logging.py` | `python/opendeviationbar/notify/telegram.py` | `_send()` static method calls `send_telegram()` | WIRED  | `_TelegramLogSink._send()` imports and calls `send_telegram(html, disable_notification=False, timeout=NetworkConfig().log_sink_timeout_s)` at lines 199-206 |

### Requirements Coverage

| Requirement | Source Plan   | Description                                                                                  | Status    | Evidence                                                                                                                         |
| ----------- | ------------- | -------------------------------------------------------------------------------------------- | --------- | -------------------------------------------------------------------------------------------------------------------------------- |
| STAB-01     | 01-01-PLAN.md | Telegram log sink uses bounded thread pool (max 2 threads), not unbounded Thread per message | SATISFIED | `ThreadPoolExecutor(max_workers=2)` replaces `threading.Thread(...).start()`; zero `threading.Thread(` occurrences in logging.py |
| STAB-02     | 01-01-PLAN.md | Failed Telegram threads do not prevent kintsugi from completing repairs                      | SATISFIED | `_send()` catches all exceptions silently; `test_failed_telegram_does_not_crash_pipeline` passes with ConnectionError            |

No orphaned requirements — REQUIREMENTS.md maps STAB-01 and STAB-02 to Phase 1 only, and both are satisfied.

### Anti-Patterns Found

| File | Line | Pattern | Severity | Impact                 |
| ---- | ---- | ------- | -------- | ---------------------- |
| —    | —    | —       | —        | No anti-patterns found |

No TODOs, no stubs, no empty implementations, no bare `threading.Thread` calls in the modified files.

### Human Verification Required

None. All behaviors are mechanically verifiable (thread pool instantiation, absence of `threading.Thread(`, exception swallowing, config default value, test pass/fail).

### Gaps Summary

No gaps. All three observable truths are fully verified at all three levels (exists, substantive, wired). Both STAB-01 and STAB-02 requirements are satisfied. Test suite passes (4/4).

---

_Verified: 2026-03-20T08:30:00Z_
_Verifier: Claude (gsd-verifier)_
