用django 框架，异步任务用celery，队列用redis
出现了这个问题，too many connection
Couldn't ack '5f41afc62d-a112-bef34d5de1cc', reason:ConnectionError('Too many connections',)
Traceback (most recent call last):
File "/srv/www/wom/env/lib/python2.6/site-packages/kombu/message.py", line 93, in ack_log_error
self.ack()
File "/srv/www/wom/env/lib/python2.6/site-packages/kombu/message.py", line 88, in ack
self.channel.basic_ack(self.delivery_tag)
File "/srv/www/wom/env/lib/python2.6/site-packages/kombu/transport/virtual/__init__.py", line 566, in basic_ack
self.qos.ack(delivery_tag)
File "/srv/www/wom/env/lib/python2.6/site-packages/kombu/transport/redis.py", line 152, in ack
self._remove_from_indices(delivery_tag).execute()
File "/srv/www/wom/env/lib/python2.6/site-packages/redis/client.py", line 1914, in execute
self.shard_hint)
File "/srv/www/wom/env/lib/python2.6/site-packages/redis/connection.py", line 395, in get_connection
connection = self.make_connection()
File "/srv/www/wom/env/lib/python2.6/site-packages/redis/connection.py", line 402, in make_connection
raise ConnectionError("Too many connections")
ConnectionError: Too many connections
看了文档之后，要设个变量
BROKER_POOL_LIMIT
The maximum number of connections that can be open in the connection pool.
The pool is enabled by default since version 2.5, with a default limit of ten connections. This number can be tweaked depending on the number of threads/greenthreads (eventlet/gevent) using a connection. For example running eventlet with 1000 greenlets that use a connection to the broker, contention can arise and you should consider increasing the limit.
If set to None or 0 the connection pool will be disabled and connections will be established and closed for every use.
Default (since 2.5) is to use a pool of 10 connections.
CELERY_REDIS_MAX_CONNECTIONS
Maximum number of connections available in the Redis connection pool used for sending and retrieving results.
BROKER_TRANSPORT_OPTIONS
A dict of additional options passed to the underlying transport.
See your transport user manual for supported options (if any).
Example setting the visibility timeout (supported by Redis and SQS transports):
BROKER_TRANSPORT_OPTIONS = {'visibility_timeout': 18000} # 5 hours
要设置 max_connections 才能解决下面的问题