我面临着一个rabbitmq [无法建立连接，目标主动拒绝]，有人可以告诉我为什么会发生这种情况吗

Question

我正在尝试将rabbitmq连接到celery以进行项目。

 ERROR/MainProcess] consumer: Cannot connect to amqp://local:**@127.0.0.1:5672//: [WinError 10061] No connection could be made because the target machine actively refused it.
Trying again in 32.00 seconds... (16/100)
[2024-01-06 14:32:06,347: CRITICAL/MainProcess] Unrecoverable error: OperationalError('[WinError 10061] No connection could be made because the target machine actively refused it')
Traceback (most recent call last):
  File "D:\venvs\mlops_backend_venv\lib\site-packages\kombu\connection.py", line 472, in _reraise_as_library_errors
    yield
  File "D:\venvs\mlops_backend_venv\lib\site-packages\kombu\connection.py", line 459, in _ensure_connection
    return retry_over_time(
  File "D:\venvs\mlops_backend_venv\lib\site-packages\kombu\utils\functional.py", line 318, in retry_over_time
    return fun(*args, **kwargs)
  File "D:\venvs\mlops_backend_venv\lib\site-packages\kombu\connection.py", line 934, in _connection_factory
    self._connection = self._establish_connection()
  File "D:\venvs\mlops_backend_venv\lib\site-packages\kombu\connection.py", line 860, in _establish_connection
    conn = self.transport.establish_connection()
  File "D:\venvs\mlops_backend_venv\lib\site-packages\kombu\transport\pyamqp.py", line 203, in establish_connection
    conn.connect()
  File "D:\venvs\mlops_backend_venv\lib\site-packages\amqp\connection.py", line 324, in connect
    self.transport.connect()
  File "D:\venvs\mlops_backend_venv\lib\site-packages\amqp\transport.py", line 129, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "D:\venvs\mlops_backend_venv\lib\site-packages\amqp\transport.py", line 184, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "D:\venvs\mlops_backend_venv\lib\site-packages\celery\worker\worker.py", line 202, in start
    self.blueprint.start(self)
  File "D:\venvs\mlops_backend_venv\lib\site-packages\celery\bootsteps.py", line 116, in start
    step.start(parent)
  File "D:\venvs\mlops_backend_venv\lib\site-packages\celery\bootsteps.py", line 365, in start
    return self.obj.start()
  File "D:\venvs\mlops_backend_venv\lib\site-packages\celery\worker\consumer\consumer.py", line 340, in start
    blueprint.start(self)
  File "D:\venvs\mlops_backend_venv\lib\site-packages\celery\bootsteps.py", line 116, in start

我尝试在rabbitmq管理界面更改权限，检查日志，重新启动rabbitmq服务器，仔细检查用户名，密码，检查端口是否正确并监听，禁用和启用插件。后端创建了所需的交换，但队列没有（只是通知它是否有帮助）。但问题依然存在。

我是rabbitmq的新手，无法理解这个错误。有人可以解释一下这个错误是什么以及如何解决它吗？

Answer 1

“主动拒绝”是指客户端的TCP 3次握手 失败并返回 RST（重置）数据包（或者不太可能， 防火墙在管理上禁止返回 ICMP）。

您可以使用

nc

netcat 或

自行测试

telnet 127.0.0.1 5672

目前你会看到

Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host

修复配置、telnet 和其他客户端后 就能成功连接。 因此，当您调整配置详细信息时，这是一个快速方便的测试。

最重要的是让一个守护进程在该端口上运行和侦听。 此外，如果您的服务器是 10.0.0.7，那就不好了， 并且守护进程绑定到套接字标识符“10.0.0.7:5672” 而不是“127.0.0.1:5672”或等效于通配符 IPv4 地址。

如果配置了本地防火墙那就不好了 它禁止此类连接尝试。

查阅

netstat -an

的输出（即所有 TCP 连接、数字 ips） 查看本地守护程序正在侦听的端口的列表。 5672 的条目应该来来去去， 根据 RabbitMQ 是否正在运行。