Question

我有一个使用Tornado和RethinkDB构建的python服务器。它已经运行了很长时间，每个用户打开几个数据库连接。我从来没有遇到过任何重大问题，只要关闭它们就可以了。但是检查出日志文件我发现有很多这样的警告：

File "/home/bundleroot/commentserver/app.py", line 30, in <module>
        db_connection = r.connect(RDB_HOST,RDB_PORT) 
      File "/home/bundleroot/commentserver/env34/lib/python3.4/site-packages/rethinkdb/net.py", line 542, in connect
        return conn.reconnect(timeout)
      File "/home/bundleroot/commentserver/env34/lib/python3.4/site-packages/rethinkdb/net.py", line 475, in reconnect
        return self._instance.connect(timeout)
      File "/home/bundleroot/commentserver/env34/lib/python3.4/site-packages/rethinkdb/net.py", line 360, in connect
        self._socket = SocketWrapper(self, timeout)
      File "/home/bundleroot/commentserver/env34/lib/python3.4/site-packages/rethinkdb/net.py", line 268, in __init__
        (self.host, self.port, ex))
    rethinkdb.errors.RqlDriverError: Could not connect to localhost:28015. Error: [Errno 111] Connection refused
    Traceback (most recent call last):
      File "/home/bundleroot/commentserver/env34/lib/python3.4/site-packages/rethinkdb/net.py", line 244, in __init__
        socket.create_connection((self.host, self.port), timeout)
      File "/usr/lib/python3.4/socket.py", line 509, in create_connection
        raise err
      File "/usr/lib/python3.4/socket.py", line 500, in create_connection
        sock.connect(sa)
    ConnectionRefusedError: [Errno 111] Connection refused

我应该担心吗？在那种情况下，有什么好的做法？

Answer 1

是的，您需要关闭连接以避免连接泄漏。这个来自RethinkDB的Flask示例就是这样做的：

https://github.com/rethinkdb/rethinkdb-example-flask-backbone-todo/blob/master/todo.py#L47-L65

即使RethinkDB没有强制对连接数施加硬性限制（我不确定它是否存在），您也可以遇到操作系统的限制。

我应该在rethinkDB中关闭与数据库的每个连接吗？

1 个答案: