Python urllib3.exceptions.NewConnectionError 连接自建API

如何解决Python urllib3.exceptions.NewConnectionError 连接自建API

我构建了一个 API（使用flask-restful），将数据存储在其缓存中并将其公开给其他应用程序。当我尝试从另一个应用程序（也是烧瓶）向此 API 发送获取请求时，它返回以下错误

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/urllib3/connection.py",line 170,in _new_conn
    (self._dns_host,self.port),self.timeout,**extra_kw
  File "/usr/local/lib/python3.6/dist-packages/urllib3/util/connection.py",line 73,in create_connection
    for res in socket.getaddrinfo(host,port,family,socket.soCK_STREAM):
  File "/usr/lib/python3.6/socket.py",line 745,in getaddrinfo
    for res in _socket.getaddrinfo(host,type,proto,flags):
socket.gaierror: [Errno -2] Name or service not kNown

During handling of the above exception,another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/urllib3/connectionpool.py",line 706,in urlopen
    chunked=chunked,File "/usr/local/lib/python3.6/dist-packages/urllib3/connectionpool.py",line 382,in _make_request
    self._validate_conn(conn)
  File "/usr/local/lib/python3.6/dist-packages/urllib3/connectionpool.py",line 1010,in _validate_conn
    conn.connect()
  File "/usr/local/lib/python3.6/dist-packages/urllib3/connection.py",line 353,in connect
    conn = self._new_conn()
  File "/usr/local/lib/python3.6/dist-packages/urllib3/connection.py",line 182,in _new_conn
    self,"Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPSConnection object at 0x7f6f965d9358>: Failed to establish a new connection: [Errno -2] Name or service not kNown

During handling of the above exception,another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/urllib3/util/retry.py",line 574,in increment
    raise MaxRetryError(_pool,url,error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='data-collector.cloud',port=443): Max retries exceeded with url: /sample_url (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f6f965d9358>: Failed to establish a new connection: [Errno -2] Name or service not kNown',))

我认为发生此错误是因为我向 API 发送了太多具有相同 url 的请求。然后我通过添加来限制 API 调用的数量 decorators = [index.limiter.limit("60/minute")] 到 API。然而，错误仍然存​​在。然后我认为错误可能是由服务器接受的调用量引起的。我以为我在进行 API 调用后没有正确关闭连接。所以我加了

from requests.packages.urllib3 import Retry,PoolManager

retries = Retry(connect=5,read=2,redirect=5)
with PoolManager(retries=retries) as http:
    response = http.request('GET',url)

但这也没有解决我的问题。我在这里缺少什么？我使用的是python3.8

编辑：我发现它本身并不是导致它的查询，因为如果我尝试其他查询，则会弹出相同的消息。我仍然不知道如何调试这个：/

解决方法

错误说：“名称或服务未知”。换句话说，这是一个名称解析问题 (DNS)。

交叉检查目标主机（“data-collector.cloud”，不在公共 DNS 记录中。）