Python HDFS(WebHDFS)放置/创建失败-getaddrinfo失败
在使用Python hdfs库提交请求时,我收到以下失败消息Python HDFS(WebHDFS)放置/创建失败-getaddrinfo失败,python,hadoop,hdfs,Python,Hadoop,Hdfs,在使用Python hdfs库提交请求时,我收到以下失败消息 Traceback (most recent call last): File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\urllib3\connection.py", line 160, in _new_conn (self._dns_host, self.port), self.timeout, **extr
Traceback (most recent call last):
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\urllib3\connection.py", line 160, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw)
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\urllib3\util\connection.py", line 57, in create_connection
for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\socket.py", line 748, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 11001] getaddrinfo failed
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "hdfs_test.py", line 128, in <module>
sys.exit(main(sys.argv))
File "hdfs_test.py", line 108, in main
hdfs_stream.write(raw_bytes)
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\hdfs\util.py", line 104, in __exit__
raise self._err # pylint: disable=raising-bad-type
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\hdfs\util.py", line 76, in consumer
self._consumer(data)
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\hdfs\client.py", line 469, in consumer
data=(c.encode(encoding) for c in _data) if encoding else _data,
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\hdfs\client.py", line 214, in _request
**kwargs
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\requests\sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\requests\sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\requests\adapters.py", line 467, in send
low_conn.endheaders()
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\http\client.py", line 1239, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\http\client.py", line 1026, in _send_output
self.send(msg)
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\http\client.py", line 966, in send
self.connect()
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\urllib3\connection.py", line 183, in connect
conn = self._new_conn()
File "C:\Users\133041\AppData\Local\Programs\Python\Python37-32\lib\site-packages\urllib3\connection.py", line 169, in _new_conn
self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x0D9A51F0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed
如果手动测试WebHDFS CREATE命令,您将看到它重定向到datanode
WebHDFS的响应试图将您重定向到Hadoop数据节点
注意响应中的位置
这是错误的!,这是我的docker容器的ID,因为没有设置主机名
确保datanode是可访问的
确保主机名正确,并且可以从namenode和执行脚本的位置解析主机名。
在我的例子中,我使用的是Docker,所以我需要在Docker-compose.yml脚本中显式设置我的主机名。一旦我这样做了,一切都很顺利
curl -i -X PUT "http://localhost:50070/webhdfs/v1/tmp/test.txt?user.name=hadoop&op=CREATE"
HTTP/1.1 307 TEMPORARY_REDIRECT
Cache-Control: no-cache
Expires: Wed, 17 Jul 2019 17:16:00 GMT
Date: Wed, 17 Jul 2019 17:16:00 GMT
Pragma: no-cache
Expires: Wed, 17 Jul 2019 17:16:00 GMT
Date: Wed, 17 Jul 2019 17:16:00 GMT
Pragma: no-cache
Set-Cookie: hadoop.auth="u=hadoop&p=hadoop&t=simple&e=1563419760195&s=P2msnW447qKKXqfKcsEaTWSXnI0="; Path=/; Expires=Thu, 18-Jul-2019 03:16:00 GMT; HttpOnly
Location: http://datanode:50075/webhdfs/v1/tmp/test.txt?op=CREATE&user.name=hadoop&namenoderpcaddress=namenode:8020&overwrite=false
Content-Type: application/octet-stream
Content-Length: 0
Server: Jetty(6.1.26)