Memory leaks when using redis as a broker

Using SimpleQueue and Redis as a broker causes memory leaks, at rate from 3 and up to 8 Mbytes/s.

Tested on two machines running: Python 2.7.12, OSX 10.11.6 and one with Debian 8.6 x86_64.

Pip freeze:

amqp==1.4.9 anyjson==0.3.3 kombu==3.0.35 redis==2.10.5

Script to reproduce:

#!/usr/bin/env python

import json
from kombu import Connection

class D(object):
    broker_uri = 'redis://'
    def put_message(self, message):
        with Connection(self.broker_uri) as conn:
            simple_queue = conn.SimpleQueue('simple_queue')
            simple_queue.put(json.dumps(message))
            print('Sent: %s' % message)
            simple_queue.close()

    def fill(self, stop=1800000):
        for i in xrange(1, stop + 1):
            self.put_message(i)


d = D()
d.fill()

[tb0hdan]

Thanks 👍

[ask]

Able to reproduce using just:

for i in range(1800000):
    with Connection('redis://') as conn:
        assert conn.default_channel
        print('Opened #{0!r}'.format(i))