Michael Bolin 8fea372c77 Fix remote app-server shutdown race (#18936) ...

## Why

A Mac Bazel CI run saw `remote_notifications_arrive_over_websocket` fail
during shutdown with `remote app-server shutdown channel is closed`
(https://app.buildbuddy.io/invocation/9dac05d6-ae20-40f9-b627-fca6e91cf127).
The remote websocket worker can legitimately finish while `shutdown()`
is waiting for the shutdown acknowledgement: after the test server sends
a notification and exits, the worker may deliver the required disconnect
event, observe that the caller has dropped the event receiver, and exit
before it sends the shutdown one-shot.

That state is already terminal cleanup, not a failed shutdown, so
callers should not see a `BrokenPipe` from the acknowledgement channel.

## What Changed

- Treat a closed remote shutdown acknowledgement as an already-exited
worker while still propagating websocket close errors when the worker
returns them.
- Added a deterministic regression test for the interleaving where the
shutdown command is received and the worker exits before replying.

## Verification

- `cargo test -p codex-app-server-client`
- New test:
`remote::tests::shutdown_tolerates_worker_exit_after_command_is_queued`

8fea372c77 · 2026-04-22 02:41:19 +00:00

History

..

lib.rs

Support multiple managed environments (#18401)

2026-04-21 15:29:35 -07:00

remote.rs

Fix remote app-server shutdown race (#18936)

2026-04-22 02:41:19 +00:00