redis.exceptions.ConnectionError: Error 111 connecting to localhost:6379. Connection refused.

本文介绍了一个常见的Redis连接问题,即“Connection refused”错误,并提供了解决方案,包括安装Redis服务器的具体步骤。

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$ pip install redis
>>> import redis
>>> conn = redis.Redis()
>>> conn.keys('*')
Traceback (most recent call last):
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 484, in connect
    sock = self._connect()
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 541, in _connect
    raise err
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 529, in _connect
    sock.connect(socket_address)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/henry/.local/lib/python3.5/site-packages/redis/client.py", line 667, in execute_command
    connection.send_command(*args)
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 610, in send_command
    self.send_packed_command(self.pack_command(*args))
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 585, in send_packed_command
    self.connect()
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 489, in connect
    raise ConnectionError(self._error_message(e))
redis.exceptions.ConnectionError: Error 111 connecting to localhost:6379. Connection refused.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 484, in connect
    sock = self._connect()
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 541, in _connect
    raise err
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 529, in _connect
    sock.connect(socket_address)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/henry/.local/lib/python3.5/site-packages/redis/client.py", line 1032, in keys
    return self.execute_command('KEYS', pattern)
  File "/home/henry/.local/lib/python3.5/site-packages/redis/client.py", line 673, in execute_command
    connection.send_command(*args)
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 610, in send_command
    self.send_packed_command(self.pack_command(*args))
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 585, in send_packed_command
    self.connect()
  File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 489, in connect
    raise ConnectionError(self._error_message(e))
redis.exceptions.ConnectionError: Error 111 connecting to localhost:6379. Connection refused.

这个问题是因为没安装Redis服务器造成的。
解决办法:

sudo apt-get install redis-server

参考文献:
1. Rescue : Connection refused - Unable to connect to Redis on localhost:6379

在docker中启动superset,开启生成缩略图,容器中配置的redis也成功启动了,但是还是报错Traceback (most recent call last): superset_app | File "/app/.venv/lib/python3.11/site-packages/flask_appbuilder/api/__init__.py", line 111, in wraps superset_app | return f(self, *args, **kwargs) superset_app | ^^^^^^^^^^^^^^^^^^^^^^^^ superset_app | File "/app/superset/views/base_api.py", line 120, in wraps superset_app | duration, response = time_function(f, self, *args, **kwargs) superset_app | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ superset_app | File "/app/superset/utils/core.py", line 1363, in time_function superset_app | response = func(*args, **kwargs) superset_app | ^^^^^^^^^^^^^^^^^^^^^ superset_app | File "/app/superset/utils/log.py", line 303, in wrapper superset_app | value = f(*args, **kwargs) superset_app | ^^^^^^^^^^^^^^^^^^ superset_app | File "/app/superset/charts/api.py", line 750, in thumbnail superset_app | screenshot_obj.get_from_cache_key(cache_key) or ScreenshotCachePayload() superset_app | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ superset_app | File "/app/superset/utils/screenshots.py", line 206, in get_from_cache_key superset_app | if payload := cls.cache.get(cache_key): superset_app | ^^^^^^^^^^^^^^^^^^^^^^^^ superset_app | File "/app/.venv/lib/python3.11/site-packages/flask_caching/__init__.py", line 195, in get superset_app | return self.cache.get(*args, **kwargs) superset_app | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ superset_app | File "/app/.venv/lib/python3.11/site-packages/cachelib/redis.py", line 72, in get superset_app | return self.serializer.loads(self._read_client.get(self.key_prefix + key)) superset_app | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ superset_app | File "/app/.venv/lib/python3.11/site-packages/redis/commands/core.py", line 1816, in get superset_app | return self.execute_command("GET", name) superset_app | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ superset_app | File "/app/.venv/lib/python3.11/site-packages/redis/client.py", line 1266, in execute_command superset_app | conn = self.connection or pool.get_connection(command_name, **options) superset_app | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ superset_app | File "/app/.venv/lib/python3.11/site-packages/redis/connection.py", line 1461, in get_connection superset_app | connection.connect() superset_app | File "/app/.venv/lib/python3.11/site-packages/redis/connection.py", line 713, in connect superset_app | raise ConnectionError(self._error_message(e)) superset_app | redis.exceptions.ConnectionError: Error 111 connecting to localhost:6379. Connection refused. superset_app | 172.20.0.1 - - [26/Mar/2025:10:40:59 +0000] "GET /api/v1/chart/53/thumbnail/33abcd9ad6c3752ac558350cb4dfe056/ HTTP/1.1" 500 31 "http://127.0.0.1:8088/superset/welcome/" "Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0" superset_app | 2025-03-26 10:40:59,222:ERROR:flask_appbuilder.api:Error 111 connecting to localhost:6379. Connection refused.
03-27
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