How to handle "Redis.exceptions.ConnectionError: Connection has data"

Question

我收到以下输出：

Traceback (most recent call last):
  File "/home/ec2-user/env/lib64/python3.7/site-packages/redis/connection.py", line 1192, in get_connection
    raise ConnectionError('Connection has data')
redis.exceptions.ConnectionError: Connection has data

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/ec2-user/env/lib64/python3.7/site-packages/eventlet/hubs/hub.py", line 457, in fire_timers
    timer()
  File "/home/ec2-user/env/lib64/python3.7/site-packages/eventlet/hubs/timer.py", line 58, in __call__
    cb(*args, **kw)
  File "/home/ec2-user/env/lib64/python3.7/site-packages/eventlet/greenthread.py", line 214, in main
    result = function(*args, **kwargs)
  File "crawler.py", line 53, in fetch_listing
    url = dequeue_url()
  File "/home/ec2-user/WebCrawler/helpers.py", line 109, in dequeue_url
    return redis.spop("listing_url_queue")
  File "/home/ec2-user/env/lib64/python3.7/site-packages/redis/client.py", line 2255, in spop
    return self.execute_command('SPOP', name, *args)
  File "/home/ec2-user/env/lib64/python3.7/site-packages/redis/client.py", line 875, in execute_command
    conn = self.connection or pool.get_connection(command_name, **options)
  File "/home/ec2-user/env/lib64/python3.7/site-packages/redis/connection.py", line 1197, in get_connection
    raise ConnectionError('Connection not ready')
redis.exceptions.ConnectionError: Connection not ready

我找不到与此特定错误相关的任何问题。我emptied/flushed都是redis数据库，应该没有数据吧。我认为它与 eventlet 和修补有关。但是即使我将以下代码放在文件的开头，也会出现错误。

import eventlet
eventlet.monkey_path()

这个错误是什么意思？

Answer 1

终于，我找到了问题的答案。使用python连接redis时，我指定了编号为0的数据库。

redis = redis.Redis(host=example.com, port=6379, db=0)

将数据库更改为数字 1 后，它起作用了。

redis = redis.Redis(host=example.com, port=6379, db=1)

Answer 2

另一种方法是在etc\redis\redis.conf中将protected_mode设置为无。运行本地redis时推荐。

How to handle "Redis.exceptions.ConnectionError: Connection has data"

How to handle "Redis.exceptions.ConnectionError: Connection has data"

python

web-crawler

redis

eventlet

python-requests