Python 建立新连接失败
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Failed to establish a new connection
提问by mohamed desouky
import requests
url = 'http://ES_search_demo.com/document/record/_search?pretty=true'
data = '{"query":{"bool":{"must":[{"text":{"record.document":"SOME_JOURNAL"}},{"text":{"record.articleTitle":"farmers"}}],"must_not":[],"should":[]}},"from":0,"size":50,"sort":[],"facets":{}}'
response = requests.get(url, data=data)
when i run this code i get this error
当我运行此代码时，我收到此错误
Traceback (most recent call last):
File "simpleclient.py", line 6, in <module>
response = requests.get(url, data=data)
File "/home/ryan/local/lib/python2.7/site-packages/requests/api.py", line 70, in get
return request('get', url, params=params, **kwargs)
File "/home/ryan/local/lib/python2.7/site-packages/requests/api.py", line 56, in request
return session.request(method=method, url=url, **kwargs)
File "/home/ryan/local/lib/python2.7/site-packages/requests/sessions.py", line 471, in request
resp = self.send(prep, **send_kwargs)
File "/home/ryan/local/lib/python2.7/site-packages/requests/sessions.py", line 581, in send
r = adapter.send(request, **kwargs)
File "/home/ryan/local/lib/python2.7/site-packages/requests/adapters.py", line 481, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='es_search_demo.com', port=80): Max retries exceeded with url: /document/record/_search?pretty=true (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x7f544af9a5d0>: Failed to establish a new connection: [Errno -2] Name or service not known',))
回答by miraculixx
NewConnectionError(': Failed to establish a new connection: [Errno -5] No address associated with hostname',))
NewConnectionError(': 建立新连接失败: [Errno -5] 没有与主机名关联的地址',))
In other words, your DNS does not have an IP address for the given host. Since there is, however, a valid IP address with the domain name given originally, probably there is no connection to the internet:
换句话说，您的 DNS 没有给定主机的 IP 地址。然而，由于有一个有效的 IP 地址和最初给出的域名，可能没有连接到互联网：
$ nslookup mmsdemo.cloudapp.net
(...)
Non-authoritative answer:
Name: mmsdemo.cloudapp.net
Address: 40.113.108.105
In other words, check that the internet connection is set up properly (on the machine that runs your code, and more specifically, that python can make use of it).
换句话说，检查互联网连接是否设置正确（在运行代码的机器上，更具体地说，python 可以使用它）。
Update
更新
The hostname given originally was as in my first answer. The new domain now in the question proofs my assumption was right:
最初给出的主机名与我的第一个答案一样。现在问题中的新域证明我的假设是正确的：
$ nslookup es_search_demo.com
(...)
** server can't find es_search_demo.com: NXDOMAIN
回答by AndreyF
Seems like your DNS server can't find an address associated to the URL you are passing
似乎您的 DNS 服务器找不到与您传递的 URL 关联的地址
