The previous cleanup recipe went straight to
SIGTERM+SIGKILL, which hides bugs: tractor is
structured concurrent — `_trio_main` catches SIGINT
as an OS-cancel and cascades `Portal.cancel_actor`
over IPC to every descendant. So a graceful SIGINT
exercises the actual SC teardown path; if it hangs,
that's a real bug to file (the forkserver `:1616`
zombie was originally suspected to be one of these
but turned out to be a teardown gap in
`_ForkedProc.kill()` instead).
Deats,
- step 1: `pkill -INT` scoped to `$(pwd)/py*` — no
sleep yet, just send the signal
- step 2: bounded wait loop (10 × 0.3s = ~3s) using
`pgrep` to poll for exit. Loop breaks early on
clean exit
- step 3: `pkill -9` only if graceful timed out, w/
a logged escalation msg so it's obvious when SC
teardown didn't complete
- step 4: same SIGINT-first ladder for the rare
`:1616`-holding zombie that doesn't match the
cmdline pattern (find PID via `ss -tlnp`, then
`kill -INT NNNN; sleep 1; kill -9 NNNN`)
- steps 5-6: UDS-socket `rm -f` + re-verify
unchanged
Goal: surface real teardown bugs through the test-
cleanup workflow instead of papering over them with
`-9`.
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Gud Boi
e5e2afb5f4