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    <p>It sounds like you're using the amqp as the results backend. From the <a href="http://docs.celeryproject.org/en/latest/userguide/tasks.html#rabbitmq-result-backend">docs</a> here are the pitfalls of using that particular setup:</p> <blockquote> <ul> <li>Every new task creates a new queue on the server, with thousands of tasks the broker may be overloaded with queues and this will affect<br> performance in negative ways. If you’re using RabbitMQ then each<br> queue will be a separate Erlang process, so if you’re planning to<br> keep many results simultaneously you may have to increase the Erlang<br> process limit, and the maximum number of file descriptors your OS<br> allows </li> <li>Old results will not be cleaned automatically, so you must make sure to consume the results or else the number of queues will eventually go out of control. If you’re running RabbitMQ 2.1.1 or higher you can take advantage of the x-expires argument to queues, which will expire queues after a certain time limit after they are unused. The queue expiry can be set (in seconds) by the CELERY_AMQP_TASK_RESULT_EXPIRES setting (not enabled by default).</li> </ul> </blockquote> <p>From what I've read in the <a href="http://docs.celeryproject.org/en/2.3-archived/changelog.html#version-2-3-0">changelog</a>, this is no longer the default backend in versions >=2.3.0 because users were getting bit in the rear end by this behavior. I'd suggest changing the results backend if this not the functionality you need.</p>
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