Second, deeper pass over tools/gateway/hermes_cli plus first pass over
the trees wave 1 missed (acp, acp_adapter, skills, computer_use, docker,
dashboard, conformance, monitoring, secret_sources, hermes_state,
providers). Same rubric as wave 1 (AGENTS.md test policy); security,
alternation/caching invariants, issue-number regressions, and E2E kept.
Real test-quality fixes found and rooted out along the way:
- tests/tools/test_command_guards.py made real auxiliary-LLM HTTPS calls
(DEFAULT_CONFIG smart-approval leaked in) — pinned approval
mode=manual via autouse fixture: 17.4s → 0.4s.
- test_model_switch_custom_providers.py / test_user_providers_model_switch.py
silently probed live provider catalogs (~2s/test) — stubbed
cached_provider_model_ids/provider_model_ids/fetch_api_models.
- test_telegram_noise_filter.py: 15-platform copy-paste matrix over
shared gateway.run logic → 3 representative platforms (55s → 3.9s).
- test_gateway_shutdown.py: stop()'s 5s interrupt-deadline loop spun on
MagicMock agents — interrupt.side_effect now clears _running_agents
(22s → 1.0s).
- test_gateway_inactivity_timeout.py poll-harness timings shrunk 3-5x
(24s → 1.1s); test_mcp_stability.py backoff/SIGTERM-grace sleeps
patched (15.4s → 2.5s); test_async_delegation.py negative-drain wait
5s → 0.5s.
- test_telegram_init_deadline.py: loop-block margin restored to 1.0s
with rationale comment — the watchdog-dump assertion needs the loop
blocked well past deadline+grace under parallel load (flaked once in
the 40-worker verification run at a 0.2s margin).
Verification: full hermetic suite via scripts/run_tests.sh —
2,438 files, 21,718 tests passed, 0 failed, 293.9s wall.
Suite totals vs original baseline: 46,820 → 19,757 test functions
(−57.8%), wall 583.5s → 293.9s (−50%), subprocess CPU 13,564s → 11,623s.
SocketModeClient.connect() is a "while True" retry loop that never checks
the client's closed flag, so anything still inside it when the shared
aiohttp session is closed keeps retrying against a session that can never
work again. That is the "Failed to connect (error: Session is closed);
Retrying..." spam in #46990, at a steady ping_interval cadence that only
a process restart clears.
_stop_socket_mode_handler closed the handler first and cancelled
afterwards, which loses the race. close_async() closes that shared
session, and three things can be inside connect() when it does: our own
start_async task, monitor_current_session() (on staleness) and
receive_messages() (on a CLOSE frame), the latter two reaching it
independently through connect_to_new_endpoint(). connect() also rebinds
current_session_monitor and message_receiver to fresh tasks when it
succeeds, so the set of live tasks changes across the awaits inside
close(). Cancelling from a snapshot taken partway through races a moving
target rather than closing the window.
So cancel all four before close_async() instead. With nothing left alive
to enter connect(), no rebinding can happen during teardown and the
window cannot open at all. The client's task attributes are read with
getattr so a rename inside the SDK degrades to a no-op instead of raising
during shutdown, and the wait is asyncio.wait with a timeout rather than
an unbounded await, so a task wedged in a network call cannot hold up
shutdown.
The underlying SDK defect is tracked at slackapi/python-slack-sdk#1913.
This replaces the earlier version of this change, which added a closed
session check when building a handler and another in the watchdog. Both
are unnecessary once teardown stops leaking tasks: each
AsyncSocketModeHandler builds its own SocketModeClient with a fresh
ClientSession, so a new handler cannot inherit a closed session, and the
current handler's session is only closed by the teardown path itself.
Dropping the watchdog check also keeps this off the ping/pong staleness
trigger proposed in #52923, which addresses a wedged live connection
rather than a leaked one.
Fixes#46990
Teknium