Question

我一直在与一个芹菜工人一起运行Flask应用程序，并在三个分离的Docker容器中运行Redis，没有任何问题。

这是我的启动方式：

celery worker -A app.controller.engine.celery -l info --concurrency=2 --pool eventlet

芹菜开始运转良好

 -------------- celery@a828bd5b0089 v4.2.1 (windowlicker)
---- **** -----
--- * ***  * -- Linux-4.9.93-linuxkit-aufs-x86_64-with 2018-11-15 16:06:59
-- * - **** ---
- ** ---------- [config]
- ** ---------- .> app:         app.controller.engine:0x7f8ba4eb70b8
- ** ---------- .> transport:   redis://redis:6379/0
- ** ---------- .> results:     redis://redis:6379/1
- *** --- * --- .> concurrency: 2 (eventlet)
-- ******* ---- .> task events: ON
--- ***** -----
 -------------- [queues]
                .> celery           exchange=celery(direct) key=celery


[tasks]
  . app.controller.engine.do

INFO:engineio:Server initialized for eventlet.
INFO:engineio:Server initialized for threading.
[2018-11-15 15:44:34,301: INFO/MainProcess] Connected to redis://redis:6379/0
[2018-11-15 15:44:34,321: INFO/MainProcess] mingle: searching for neighbors
[2018-11-15 15:44:35,358: INFO/MainProcess] mingle: all alone
[2018-11-15 15:44:35,396: INFO/MainProcess] pidbox: Connected to redis://redis:6379/0.
[2018-11-15 15:44:35,415: INFO/MainProcess] celery@12af03844cd0 ready.

但是在开始任务时，它突然崩溃了：

[2018-11-15 15:02:03,224: CRITICAL/MainProcess] Unrecoverable error: AttributeError("'float' object has no attribute 'items'",)
Traceback (most recent call last):
  File "/app/env/lib/python3.6/site-packages/celery/worker/worker.py", line 205, in start
    self.blueprint.start(self)
  File "/app/env/lib/python3.6/site-packages/celery/bootsteps.py", line 119, in start
    step.start(parent)
  File "/app/env/lib/python3.6/site-packages/celery/bootsteps.py", line 369, in start
    return self.obj.start()
  File "/app/env/lib/python3.6/site-packages/celery/worker/consumer/consumer.py", line 317, in start
    blueprint.start(self)
  File "/app/env/lib/python3.6/site-packages/celery/bootsteps.py", line 119, in start
    step.start(parent)
  File "/app/env/lib/python3.6/site-packages/celery/worker/consumer/consumer.py", line 593, in start
    c.loop(*c.loop_args())
  File "/app/env/lib/python3.6/site-packages/celery/worker/loops.py", line 121, in synloop
    connection.drain_events(timeout=2.0)
  File "/app/env/lib/python3.6/site-packages/kombu/connection.py", line 301, in drain_events
    return self.transport.drain_events(self.connection, **kwargs)
  File "/app/env/lib/python3.6/site-packages/kombu/transport/virtual/base.py", line 963, in drain_events
    get(self._deliver, timeout=timeout)
  File "/app/env/lib/python3.6/site-packages/kombu/transport/redis.py", line 359, in get
    ret = self.handle_event(fileno, event)
  File "/app/env/lib/python3.6/site-packages/kombu/transport/redis.py", line 341, in handle_event
    return self.on_readable(fileno), self
  File "/app/env/lib/python3.6/site-packages/kombu/transport/redis.py", line 337, in on_readable
    chan.handlers[type]()
  File "/app/env/lib/python3.6/site-packages/kombu/transport/redis.py", line 724, in _brpop_read
    self.connection._deliver(loads(bytes_to_str(item)), dest)
  File "/app/env/lib/python3.6/site-packages/kombu/transport/virtual/base.py", line 983, in _deliver
    callback(message)
  File "/app/env/lib/python3.6/site-packages/kombu/transport/virtual/base.py", line 632, in _callback
    self.qos.append(message, message.delivery_tag)
  File "/app/env/lib/python3.6/site-packages/kombu/transport/redis.py", line 149, in append
    pipe.zadd(self.unacked_index_key, time(), delivery_tag) \
  File "/app/env/lib/python3.6/site-packages/redis/client.py", line 2263, in zadd
    for pair in iteritems(mapping):
  File "/app/env/lib/python3.6/site-packages/redis/_compat.py", line 123, in iteritems
    return iter(x.items())
AttributeError: 'float' object has no attribute 'items'

在堆栈跟踪中看不到任何对我的代码的引用。

这是任务方法：

@celery.task()
def do(module_name, json_input):
    logger.info('____ Running _________________________')
    logger.info('testing ***********************')
    #modules.run(module_name, json_input)

我评论了对我的实际代码的调用，只是为了验证我没有把我的模块代码弄乱了。。但是它还是崩溃了。

任何人都知道什么地方可能出问题或如何正确调试它？

非常感谢

Answer 1

问题是我的celery容器在构建时使用pip下载了redis软件包的新版本，最终导致bug或严重的更改，当celery在连接到redis时尝试使用它时，崩溃了。这个新的redis库是3.0.0，并于今天发布。

要解决此问题，您必须在requirements.txt（即2.10.6）中指定以前的版本。

实际上，在requirements.txt文件中指定软件包版本是防止此类问题的一种好习惯。

Answer 2

我今天也遇到了同样的问题。希望这可以在Celery的更新中很快得到解决。我也恢复了以前的版本。

Answer 3

没有足够的代表发表评论：

此问题由芹菜人们在以下位置进行跟踪： https://github.com/celery/celery/issues/5175

此PR的领导者： https://github.com/celery/celery/pull/5176

已被合并和还原。因为其他一些修复程序降落了。我不确定是否可以解决问题。对我来说不再重要了。

Answer 4

对于使用docker-airflow的任何人，我使用的是puckel/docker-airflow 只需添加

即可修改dockerfile

   && pip install 'redis>=2.10.5,<3'\

通过将芹菜添加到apache-airflow内置模块（即

）中，仅用celery[redis]替换celery

  && pip install apache-airflow[crypto,celery,postgres,hive,jdbc,mysql]==$AIRFLOW_VERSION

更新：他们最近还更改了docker-airflow dockerfile来修复此错误，请参见here

Celery CRITICAL / MainProcess]无法恢复的错误：AttributeError（“'float'对象没有属性'items'”，）

4 个答案: