Henrique Andrade <h...@unscrambl.com> added the comment: Here is the repro (I am running this on Ubuntu 16 with the stock Python version 2.7.12):
========================================================================================
#!/usr/bin/env python
import os
import subprocess
import sys
from multiprocessing import Process, Queue
from multiprocessing.queues import _sentinel
def run_external_application(application_name, queue):
"""Runs an Oxygen application"""
exit_status = 10
queue.put(exit_status)
# none of the following help as far as making the pipe go away
queue.put(_sentinel)
queue.close()
def run(application_name="external_application"):
print "Starting '%s'" % application_name
queue = Queue()
application_process = Process(target=run_external_application,
args=(application_name, queue))
application_process.start()
try:
application_process.join()
except KeyboardInterrupt:
application_process.terminate()
exit_status = queue.get()
print "exit status", exit_status
queue.close()
# the deletion below has no effect
del queue
# the only thing that will make the pipe go away is to uncomment the below
statement
# queue._writer.close()
print "\nthe '%s' application finished with exit status '%s'...\n" %
(application_name, exit_status)
print "Note the file descriptor #4 below"
subprocess.call(["ls", "-la", "/proc/%d/fd" % os.getpid()])
return exit_status
if __name__ == "__main__":
print "starting ", os.getpid()
exit_status = run()
sys.exit(exit_status)
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue33081>
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