Mark Backman 47e53890e3 Fix FastAPI WebSocket disconnect race condition causing pipeline hang ...

When the remote side disconnects while send() is in flight, send() was
setting _closing=True. This prevented the receive loop from firing
on_client_disconnected, causing the pipeline to hang waiting for a
disconnect signal that never came.

The fix removes _closing from send() (that flag means we initiated the
close) and instead checks Starlette application_state in _can_send()
to suppress subsequent sends after a failure.

Fixes #3912

2026-03-28 00:01:25 -04:00

7.7 KiB

Raw Blame History

View Raw