[issue5912] import deadlocks when using fork

[Alan Pevec]

Alan Pevec ape...@gmail.com added the comment:

Issue is not reproducible with python 2.5, following patch fixes it on
python 2.4:

--- os.py-2.4 2009-05-14 12:54:08.0 +
+++ os.py 2009-05-14 13:06:21.0 +
@@ -351,8 +351,8 @@

 __all__.extend([execl,execle,execlp,execlpe,execvp,execvpe])

+from errno import ENOENT, ENOTDIR
 def _execvpe(file, args, env=None):
-from errno import ENOENT, ENOTDIR

 if env is not None:
 func = execve

--
nosy: +apevec
versions:  -Python 2.5, Python 2.6

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[issue5912] import deadlocks when using fork

[Benjamin Peterson]

Benjamin Peterson benja...@python.org added the comment:

2.4 is no longer supported.

--
nosy: +benjamin.peterson
resolution:  - out of date
status: open - closed

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[issue5912] import deadlocks when using fork

[Stefan Ring]

Changes by Stefan Ring stefan...@gmail.com:


--
nosy: +Ringding

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[issue5912] import deadlocks when using fork

[ayal baron]

New submission from ayal baron ayal.ba...@rocketier.com:

While running 2 or more threads, if one thread is importing anything
(i.e. has the import lock) and the other thread runs fork and then the
child process runs import then the child and parent will hang forever
(the child waits on the import lock but the parent receives the signal).
see Issue1590864 for another example of this.
Following is a simple way to reproduce this behavior:

mysleep.py:
import time
time.sleep(1)

run_me_and_hang.py:
import os
import threading
import subprocess
class F(threading.Thread):
def run(self):
import mysleep
print f is out
f = F()
f.start()
a = subprocess.call([echo, DONE])
print exit

--
components: None
messages: 87044
nosy: abaron
severity: normal
status: open
title: import deadlocks when using fork
type: crash
versions: Python 2.4, Python 2.5, Python 2.6

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