After upgrading my development laptop to Mountain Lion, I've noticed that gevent.subprocess.Popen fails… Sometimes.
I've got a function:
from gevent.subprocess import check_output
def do_stuff():
result = check_output(["file", "foo.py"], stderr=STDOUT)
And it is failing with the traceback below:
Traceback (most recent call last):
...
File "myfile.py", line 105, in do_stuff
result = check_output(["file", "foo.py"], stderr=STDOUT)
File ".../gevent/subprocess.py", line 154, in check_output
process = Popen(stdout=PIPE, *popenargs, **kwargs)
File ".../gevent/subprocess.py", line 231, in __init__
errread, errwrite)
File ".../gevent/subprocess.py", line 714, in _execute_child
data = errpipe_read.read(1048576)
File "...ython2.7/socket.py", line 380, in read
data = self._sock.recv(left)
File ".../gevent/fileobject.py", line 114, in recv
data = os.read(self.fileno(), size)
OSError: [Errno 22] Invalid argument
However, my attempt to recreate the bug:
from gevent import monkey; monkey.patch_all()
import os
import gevent
from gevent.subprocess import check_output, STDOUT
def stuff(x):
f = x and "/dev/asdf" or "/dev/null"
print check_output(["file", f], stderr=STDOUT).strip()
while True:
pid = gevent.fork()
if pid == 0:
gevent.joinall([
gevent.spawn(stuff, x % 2)
for x in range(10)
])
else:
os.waitpid(-1, 0)
gevent.sleep(1)
Has failed. The above programs runs without issue.
What's going on? Or, at very least, any pointers on how I could start debugging this?
Versions: gevent 1.0b3, Python 2.7.2, OS X 10.8.2, libev 4.11 (from homebrew).
