connection leaking in urllib3

README.txt

Required pacakges: gunicorn gevent urllib3

1) Start gunicorn: gunicorn -k gevent -w 9 test:app --access-logfile=-
2) Run the test: python test.py

By the end of the test, there should be 5 connections in the pool (5 False 624 1007), but in reality, it's showing 0 (0 True 5 9)

test.py

from gevent import monkey
monkey.patch_all()

import gevent
import os
import sys
import time
import urllib3

URL = 'http://localhost:8000/'
TIMEOUT = 1

def app(environ, start_response):
	data = "success"
	start_response("404 Not Found", [
		("Content-Type", "text/plain"),
		("Content-Length", str(len(data)))
	])
	
	time.sleep(TIMEOUT+1)
	
	return iter([data])

def main():
	pool = urllib3.PoolManager(num_pools=25, maxsize=5, block=True, timeout=TIMEOUT)
	
	def stats():
		p = pool.connection_from_host('localhost', 8000)
		sys.stderr.write('%d %r %d %d\n' % (p.pool.qsize(), p.pool.empty(), p.num_connections, p.num_requests))
	
	def hit():
		class MyCrazyTimeout(Exception):
			pass
		
		with gevent.Timeout(TIMEOUT, MyCrazyTimeout) as timeout_ex:
			try:
				print pool.urlopen('GET', URL).data
			except:
				# print sys.exc_info()
				pass
	
	wait = [gevent.Greenlet.spawn(hit) for i in xrange(1000)]
	time.sleep(4)
	stats()
	
	wait += [gevent.Greenlet.spawn(hit) for i in xrange(1000)]
	stats()
		
	gevent.joinall(wait)
	
	time.sleep(TIMEOUT+1)
	
	stats()
	
if __name__ == "__main__":
	main()