【Python】Visdom：ConnectionRefusedError: [WinError 10061] 由于目标计算机积极拒绝，无法连接。

【Python】Visdom：ConnectionRefusedError: [WinError 10061] 由于目标计算机积极拒绝，无法连接。

问题描述

Traceback (most recent call last):
  File "<PATH>\lib\site-packages\urllib3\connection.py", line 196, in _new_conn
    sock = connection.create_connection(
  File "<PATH>\lib\site-packages\urllib3\util\connection.py", line 85, in create_connection
    raise err
  File "<PATH>\lib\site-packages\urllib3\util\connection.py", line 73, in create_connection
    sock.connect(sa)
ConnectionRefusedError: [WinError 10061] 由于目标计算机积极拒绝，无法连接。

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<PATH>\lib\site-packages\urllib3\connectionpool.py", line 789, in urlopen
    response = self._make_request(
  File "<PATH>\lib\site-packages\urllib3\connectionpool.py", line 495, in _make_request
    conn.request(
  File "<PATH>\lib\site-packages\urllib3\connection.py", line 398, in request
    self.endheaders()
  File "<PATH>\lib\http\client.py", line 1278, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "<PATH>\lib\http\client.py", line 1038, in _send_output
    self.send(msg)
  File "<PATH>\lib\http\client.py", line 976, in send
    self.connect()
  File "<PATH>\lib\site-packages\urllib3\connection.py", line 236, in connect
    self.sock = self._new_conn()
  File "<PATH>\lib\site-packages\urllib3\connection.py", line 211, in _new_conn
    raise NewConnectionError(
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x000002022D66A140>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<PATH>\lib\site-packages\requests\adapters.py", line 667, in send
    resp = conn.urlopen(
  File "<PATH>\lib\site-packages\urllib3\connectionpool.py", line 843, in urlopen
    retries = retries.increment(
  File "<PATH>\lib\site-packages\urllib3\util\retry.py", line 519, in increment
    raise MaxRetryError(_pool, url, reason) from reason  # type: ignore[arg-type]
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='localhost', port=8097): Max retries exceeded with url: /env/caffe2torch_tripletloss (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x000002022D66A140>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<PATH>\lib\site-packages\visdom\__init__.py", line 756, in _send
    return self._handle_post(
  File "<PATH>\lib\site-packages\visdom\__init__.py", line 720, in _handle_post
    r = self.session.post(url, data=data)
  File "<PATH>\lib\site-packages\requests\sessions.py", line 637, in post
    return self.request("POST", url, data=data, json=json, **kwargs)
  File "<PATH>\lib\site-packages\requests\sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
  File "<PATH>\lib\site-packages\requests\sessions.py", line 703, in send
    r = adapter.send(request, **kwargs)
  File "<PATH>\lib\site-packages\requests\adapters.py", line 700, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=8097): Max retries exceeded with url: /env/caffe2torch_tripletloss (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x000002022D66A140>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。'))
Without the incoming socket you cannot receive events from the server or register event handlers to your Visdom client.

原因分析

应用程序尝试连接到运行在localhost上端口8097的Visdom服务器，但连接被拒绝。因为Visdom服务器没有运行。

Visdom 是 Facebook AI Research (FAIR) 开发的一个可视化工具，用于实时可视化数据。它特别适用于机器学习实验，允许用户创建、组织和共享数据和模型的可视化。

解决方案

在运行训练脚本之前启动Visdom服务器：

python -m visdom.server