BlockingIOError: [Errno 35] Resource temporarily unavailable #1185
Description
Seen in CI on macOS 13 https://github.com/mitogen-hq/mitogen/actions/runs/11669080981/job/32490230504?pr=1176
TASK [Create /tmp/512mb.zero creates=/tmp/512mb.zero, _raw_params=dd if=/dev/zero of=/tmp/512mb.zero bs=1048576 count=512;
chmod go= /tmp/512mb.zero
] ***
Monday 04 November 2024 17:08:28 +0000 (0:00:00.007) 0:00:26.162 *******
changed: [target]
TASK [Fetch /tmp/512mb.zero src=/tmp/512mb.zero, dest=/tmp/fetch-{{ inventory_hostname }}-512mb.zero, flat=True] ***
Monday 04 November 2024 17:08:30 +0000 (0:00:01.338) 0:00:27.501 *******
ERROR! [mux 5271] 17:08:37.240824 E mitogen: <Stream unix_client.5683 #1dd0> crashed
Traceback (most recent call last):
File "/Users/runner/work/mitogen/mitogen/mitogen/core.py", line 3677, in _call
func(self)
~~~~^^^^^^
File "/Users/runner/work/mitogen/mitogen/mitogen/core.py", line 1923, in on_transmit
self.protocol.on_transmit(broker)
~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
File "/Users/runner/work/mitogen/mitogen/mitogen/core.py", line 2371, in on_transmit
self._writer.on_transmit(broker)
~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
File "/Users/runner/work/mitogen/mitogen/mitogen/core.py", line 2111, in on_transmit
written = self._protocol.stream.transmit_side.write(buf)
File "/Users/runner/work/mitogen/mitogen/mitogen/core.py", line 2237, in write
written, disconnected = io_op(os.write, self.fd, s)
~~~~~^^^^^^^^^^^^^^^^^^^^^^
File "/Users/runner/work/mitogen/mitogen/mitogen/core.py", line 595, in io_op
return func(*args), None
~~~~^^^^^^^
BlockingIOError: [Errno 35] Resource temporarily unavailable
Originally posted by @moreati in #1133 (comment)