Terminating threaded programs

[mk]

Hello everyone,

I have a problem with a threaded program: it frequently hangs on sys.exit.

The problem is that my program uses threads which in turn use paramiko
library, which itself is threaded.

I try to gracefully close the threads (below), but it doesn't always
work, if paramiko calls happen to be at stage of negotiating ssh
connection or smth similar.

The only workable solution I have is a program sending itself SIGKILL,
which makes it terminated by OS (I think so).

Is there any way to brutally close the threads? I know that normally
that should not be done, but shutdown when you don't care about writing
out to disk is the only situation where it doesn't apply.

def ctrlchandler(signal, frame):
print
print ENDC + "Terminating on Ctrl-C, closing threads for:",
while queue:
for ip, th in queue:
print ip,
try:
lock.acquire()
th.abort = True
lock.release()
except RuntimeError:
pass
queue.remove((ip,th))
print
pid = os.getpid()
print "Finished closing threads."
# suicide - it's the only way of preventing frequent hangup on sys.exit
os.kill(pid, SIGTERM)
os.kill(pid, SIGKILL)
sys.exit(0)

 

[Aahz]

I have a problem with a threaded program: it frequently hangs on sys.exit.

The problem is that my program uses threads which in turn use paramiko
library, which itself is threaded.

I try to gracefully close the threads (below), but it doesn't always
work, if paramiko calls happen to be at stage of negotiating ssh
connection or smth similar.

The only workable solution I have is a program sending itself SIGKILL,
which makes it terminated by OS (I think so).

You can also use os._exit().

 

[ssteinerX]

You can also use os._exit().

This just came up on the Twisted IRC channel last night and came to the same conclusion. Python's going to wait for threads to terminate and if they're not going to, neither is Python. os._exit() came up as the 'last resort' way out of the app.

S

 

[mk]

You can also use os._exit().

Thanks!

 

[mk]

You can also use os._exit().

Yes! It works cleanly! Thanks a million!

OTOH, if I use sys.exit(), it's just hanging there.

Regards,
mk