Python py2neo SocketError:连接被拒绝

Question

我正在尝试学习this应用编程接口教程，但我在连接到neo4j时遇到问题。这是我的回溯：

>>> graph.delete_all()

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/site-packages/py2neo/core.py", line 748,    in     delete_all
 statement = StartOrMatch(self).relationship("r", "*").string + "DELETE r"
 File "/usr/local/lib/python2.7/site-packages/py2neo/cypher/util.py", line 45, in string
if self.graph.supports_start_clause:
File "/usr/local/lib/python2.7/site-packages/py2neo/core.py", line 1105, in    supports_start_clause
return self.neo4j_version < (2, 2)
 File "/usr/local/lib/python2.7/site-packages/py2neo/core.py", line 964, in    neo4j_version
return version_tuple(self.resource.metadata["neo4j_version"])
File "/usr/local/lib/python2.7/site-packages/py2neo/core.py", line 213, in metadata
self.get()
File "/usr/local/lib/python2.7/site-packages/py2neo/core.py", line 258, in get
response = self.__base.get(headers=headers, redirect_limit=redirect_limit,   **kwargs)
File "/usr/local/lib/python2.7/site-packages/py2neo/packages/httpstream/http.py", line 966, in get
return self.__get_or_head("GET", if_modified_since, headers, redirect_limit, **kwargs)
File "/usr/local/lib/python2.7/site-packages/py2neo/packages/httpstream/http.py", line 943, in __get_or_head
return rq.submit(redirect_limit=redirect_limit, **kwargs)
File "/usr/local/lib/python2.7/site-packages/py2neo/packages/httpstream/http.py", line 433, in submit
http, rs = submit(self.method, uri, self.body, self.headers)
File "/usr/local/lib/python2.7/site-packages/py2neo/packages/httpstream/http.py", line 362, in submit
raise SocketError(code, description, host_port=uri.host_port)
py2neo.packages.httpstream.http.SocketError: Connection refused

我是网络/套接字连接的新手，所以对正在发生的事情进行一个人类可读的解释将非常有帮助。

Answer 1

您没有显示您的连接代码( Graph构造函数)，也没有提到您的设置，但此错误的常见原因是(1)服务器没有运行，(2)客户端连接到错误的机器或端口，或(3)客户端和服务器之间有防火墙，阻止访问。

我建议您尝试从命令行连接到服务器，使用cURL或类似的工具，然后确保您的Python代码附加到相同的位置。

Answer 2

出现此错误是因为我在.properties文件中指定了IP地址，但我使用的是本地主机进行连接。一旦我在两个地方都使用了IP地址，它就可以工作了。

在/etc/ne4j/ne4j-server.properties中

org.neo4j.server.webserver.address=1.2.3.4

接口url：

http://neo4j:mypassword@1.2.3.4:7474/db/data/