Question

当我将Django频道的工作者作为后台任务运行时，我有时会收到错误。该任务使用一个名为Pysher的开放式第三方WebSocket来处理该数据，然后通过通道层将结果数据发送到使用Redis（Message Broker）监听我们应用程序的一组Websockets。

我知道问题与Pysher库没有关系，因为如果我评论代码通过Channel Layer发送消息会运行whitout问题。问题是由于在通道层中发送消息而发生的，有时只发生，很多时候发送成功，有时它会抛出错误，最后一种行为让我觉得它可能与Redis或频道有关层和它的配置或类似的东西，也许Redis达到了一些限制。

错误消息

error from callback bound method Connection._on_message of Connection(Thread-2, started daemon 140614612023040):
[Errno 99] Cannot assign requested address

SO和Redis版本：Ubuntu 16 + Redis 3.2

Pip Dependencies

aiodns==1.1.1
aiohttp==2.3.10
aioredis==1.0.0
amqp==2.2.2
asgiref==2.1.6
asn1crypto==0.24.0
astroid==1.6.1
async-timeout==2.0.0
attrs==17.4.0
autobahn==17.10.1
Automat==0.6.0
Babel==2.5.3
billiard==3.5.0.3
biopython==1.69
cchardet==2.1.1
celery==4.1.0
certifi==2018.1.18
cffi==1.11.4
channels==2.0.2
channels-redis==2.1.0
chardet==3.0.4
click==6.7
constantly==15.1.0
cryptography==2.1.4
daphne==2.0.4
dash==0.21.0
dash-core-components==0.21.1
dash-html-components==0.9.0
dash-renderer==0.11.3
decorator==4.2.1
Django==2.0.2
django-celery-beat==1.1.1
django-celery-results==1.0.1
django-mysql==2.2.0
Flask==0.12.2
Flask-Caching==1.4.0
Flask-Compress==1.4.0
flower==0.9.2
future==0.16.0
hiredis==0.2.0
hyperlink==17.3.1
idna==2.6
idna-ssl==1.0.0
incremental==17.5.0
ipython-genutils==0.2.0
isort==4.3.4
itsdangerous==0.24
Jinja2==2.10
jsonschema==2.6.0
jupyter-core==4.4.0
kombu==4.1.0
lazy-object-proxy==1.3.1
MarkupSafe==1.0
mccabe==0.6.1
msgpack==0.5.6
multidict==4.1.0
mysqlclient==1.3.12
nbformat==4.4.0
ndg-httpsclient==0.4.4
numpy==1.13.3
oauthlib==2.0.7
pandas==0.22.0
plotly==2.5.1
pyasn1==0.4.2
pyasn1-modules==0.2.1
pycares==2.3.0
pycparser==2.18
pylint==1.8.2
pyOpenSSL==17.5.0
Pysher==0.3.0
PySocks==1.6.8
python-dateutil==2.6.1
python-telegram-bot==10.0.1
python-twitter==3.4.1
pytz==2018.3
redis==2.10.6
requests==2.18.4
requests-oauthlib==0.8.0
service-identity==17.0.0
six==1.11.0
tornado==4.5.3
traitlets==4.3.2
Twisted==17.9.0
txaio==2.8.2
urllib3==1.22
vine==1.1.4
websocket-client==0.47.0
Werkzeug==0.14.1
wrapt==1.10.11
yarl==1.1.0
zope.interface==4.4.3

渠道层配置

CHANNEL_LAYERS = {
    "default": {
        "BACKEND": "channels_redis.core.RedisChannelLayer",
        "CONFIG": {
            "hosts": [("localhost", 6379)]
        },
    },
}

我的代码

# Synconsumer Class that runs as Channels Worker Background task
class BTWorker(SyncConsumer):

    # Class method
    def get_data(self, event):

        # Callback function that runs every time We receive a message from the thrid party Websocket
        def callback(*args, **kwargs):
            # Data processing
            raw_dict = json.loads(args[0])
            var_dict = {
                'id': raw_dict['id'],
                'other_key': other_value
            }
            var_list = [var_dict]

            # Send data via Channel Layer and Redis (CODE that generate the ISSUE!!)
            async_to_sync(self.channel_layer.group_send)(
                "group_name",
                {
                    "type": "some.type",
                    "text": json.dumps(trade_uni_list)
                }
            )

        # Websocket Third party connection handler
        def connect_handler(data):
            channel = pusher.subscribe('token')
            channel.bind('channel', callback)

        # Websocket Third Party connection via Pysher Library
        pusher = pysher.Pusher('******some_key****')
        pusher.connection.bind('pusher:connection_established', connect_handler)
        pusher.connect()

Answer 1

我知道这听起来很荒谬，因为它有时会起作用，但是你能否切换到本地主机＆＃39;至＆＃39; 127.0.0.1＆＃39;并看看是否修复？我发现某些python模块可能被localhost混淆了......即使它间歇性地工作。

我应该如何为Django Channels 2.0配置Redis？

1 个答案: