weird memory leak

[Jeremie Roux]

I have this program that leaks in a weird way:
it runs at about 80% of my CPU and after a little while (maybe 5 or 10
minutes) starts leaking (pretty big: about 1MB/minute)
If I run it with less threads, the CPU load goes down, the time it
takes to start leaking increases, and the leak is not as bad. And
eventually, if I run it single threaded, I can leave it run for days
without seing any leak (I haven't left it run longer than a week
though).

Does anyone have any idea about that? Am i doing anything wrong?

Jeremie

PS: I am running python2.1 on freebsd

####### here is my code ##########

#! /usr/bin/env python

import imaplib
import time
import threading
import sys

def work():
    while 1:
        try:
            ImapLib  = imaplib.IMAP4('mail.jarna.com', 143)
            typ, dat = ImapLib.logout()
        except:
            print 'exception: %s' % sys.exc_info()[1]

if __name__=='__main__':

    threads = []
    for i in xrange(1, 21):
        t = threading.Thread(target=work)
        t.setDaemon(1)
        t.start()
        threads.append(t)
    
    while 1:
        time.sleep(10)