1. 要正确清除等待任务的队列，您必须停止所有的worker (http://celery.readthedocs.io/en/latest/faq.html#i-ve-purged-messages-but-there-are-still-messages-left-in-the-queue):

$ sudo rabbitmqctl stop

或者(如果RabbitMQ/消息代理由Supervisor管理):

$ sudo supervisorctl stop all

2. .．.然后清除特定队列中的任务:

$ cd <source_dir>
$ celery amqp queue.purge <queue name>

3. RabbitMQ开始:

$ sudo rabbitmqctl start

或者(如果RabbitMQ由Supervisor管理):

$ sudo supervisorctl start all

对于芹菜5.0+版本，使用RabbitMQ作为代理

我们需要先建立一个从程序到经纪人的新连接， 并将连接与要清除的队列绑定。

# proj/celery.py
from celery import Celery
app = Celery('proj')

from proj.celery import app
queues = ['queue_A', 'queue_B', 'queue_C']
with app.connection_for_write() as conn:
    conn.connect()
    for queue in queues:
        count = app.amqp.queues[queue].bind(conn).purge()
        print(f'Purge {queue} with {count} message(s)')

对于芹菜3.0+:

$ celery purge

清除特定队列:

$ celery -Q queue_name purge

如果你想删除所有挂起的任务，以及活动和保留的任务，以完全停止Celery，这对我来说是有效的:

from proj.celery import app
from celery.task.control import inspect, revoke

# remove pending tasks
app.control.purge()

# remove active tasks
i = inspect()
jobs = i.active()
for hostname in jobs:
    tasks = jobs[hostname]
    for task in tasks:
        revoke(task['id'], terminate=True)

# remove reserved tasks
jobs = i.reserved()
for hostname in jobs:
    tasks = jobs[hostname]
    for task in tasks:
        revoke(task['id'], terminate=True)

从文档中可以看出:

$ celery -A proj purge

or

from proj.celery import app
app.control.purge()

(编辑:更新与当前的方法。)

芹菜3+

http://docs.celeryproject.org/en/3.1/faq.html#how-do-i-purge-all-waiting-tasks

CLI

清除命名队列:

 celery -A proj amqp queue.purge <queue name>

清除配置的队列

celery -A proj purge

I’ve purged messages, but there are still messages left in the queue? Answer: Tasks are acknowledged (removed from the queue) as soon as they are actually executed. After the worker has received a task, it will take some time until it is actually executed, especially if there are a lot of tasks already waiting for execution. Messages that are not acknowledged are held on to by the worker until it closes the connection to the broker (AMQP server). When that connection is closed (e.g. because the worker was stopped) the tasks will be re-sent by the broker to the next available worker (or the same worker when it has been restarted), so to properly purge the queue of waiting tasks you have to stop all the workers, and then purge the tasks using celery.control.purge().

因此，要清除整个队列，必须停止worker。