Gud Boi
1ebe15db3b
Fork-based backends (esp. `subint_forkserver`) can
leak child actor processes on cancelled / SIGINT'd
test runs; the zombies keep the tractor default
registry (`127.0.0.1:1616` / `/tmp/registry@1616.sock`)
bound, so every subsequent session can't bind and
50+ unrelated tests fail with the same
`TooSlowError` / "address in use" signature. Document
the pre-flight + post-cancel check as a mandatory
step 4.
Deats,
- **primary signal**: `ss -tlnp | grep ':1616'` for a
bound TCP registry listener — the authoritative
check since :1616 is unique to our runtime
- `pgrep -af` scoped to `$(pwd)/py[0-9]*/bin/python.*
_actor_child_main|subint-forkserv` for leftover
actor/forkserver procs — scoped deliberately so we
don't false-flag legit long-running tractor-
embedding apps like `piker`
- `ls /tmp/registry@*.sock` for stale UDS sockets
- scoped cleanup recipe (SIGTERM + SIGKILL sweep
using the same `$(pwd)/py*` pattern, UDS `rm -f`,
re-verify) plus a fallback for when a zombie holds
:1616 but doesn't match the pattern: `ss -tlnp` →
kill by PID
- explicit false-positive warning calling out the
`piker` case (`~/repos/piker/py*/bin/python3 -m
tractor._child ...`) so a bare `pgrep` doesn't lead
to nuking unrelated apps
Goal: short-circuit the "spelunking into test code"
rabbit-hole when the real cause is just a leaked PID
from a prior session, without collateral damage to
other tractor-embedding projects on the same box.
(this patch was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
(cherry picked from commit
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