:MongoDB.Driver.MongoConnectionException:打开与服务器的连接时发生异常 [英] : MongoDB.Driver.MongoConnectionException: An exception occurred while opening a connection to the server

问题描述

因此，我在Azure VM上使用MongoDB，并且我在Azure网站上托管了一个网站作为服务. 我的问题是:有时我会收到这样的错误:

So, I am using MongoDB on a Azure VM and I have a web site hosted on Azure web Sites as a service. My problem is: Sometimes I get an error like this:

异常:MongoDB.Driver.MongoConnectionException:打开与服务器的连接时发生异常.---> System.Net.Sockets.SocketException:连接尝试失败，因为经过一段时间后连接方未正确响应时间或已建立的连接失败，因为已连接的主机未能响应"

"Exception: MongoDB.Driver.MongoConnectionException: An exception occurred while opening a connection to the server. ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond"

出现此错误后，只需再次访问端点即可立即获得成功.

After I got this error, just I access the endpoint again and I have success immediately.

详细信息:

ConnectionString:mongodb://xxx.aaa.net:1000，xxx.aaa.net:1001，xxx.aaa.net:1002/?readPreference = nearest

ConnectionString: mongodb://xxx.aaa.net:1000, xxx.aaa.net:1001, xxx.aaa.net:1002/?readPreference=nearest

在使用Mongo打开连接之前，请设置MaxConnectioIdleTimeout属性，例如"MongoDefaults.MaxConnectionIdleTime = TimeSpan.FromSeconds(30);". ，请保持活动连接，因为默认情况下4分钟后，天蓝色LoadBalancer的空闲超时将变为无效.

Before open the conection with Mongo I set the MaxConnectioIdleTimeout property like this "MongoDefaults.MaxConnectionIdleTime = TimeSpan.FromSeconds(30);" , To keep alive connection, because the idle timeout for azure LoadBalancer become inactivy after 4 minutes by default.

所以，我不知道发生了什么事.

So, I don't know what's going on.

有人可以帮助我吗?

推荐答案

是的，需要4分钟.如果Azure保持空闲状态最多4分钟，它将关闭一个连接会话.但是mongodb驱动程序不知道它，它仍然会从连接池中获得此连接. 您可以将 MaxConnectionIdleTime (在mongodb驱动程序设置中)设置为少于4分钟，或者通过Powershell设置更大的Azure虚拟机的最大会话空闲时间(最多30分钟).

Yes, 4 minutes. Azure closes a connection session if it keeping on idling up to 4 minutes.But the mongodb driver don't know it，it will still get this connection form connection pool. You can either set the MaxConnectionIdleTime(in mongodb driver settings) less than 4 minutes, or set the max session idle time of azure VM more larger by powershell (30 minutes max).

顺便说一句，如果您的网站(也位于azure上)使用私有IP(PIP)访问mongodb服务器，则不会出现此问题.

BTW, if your web site which also hosted on azure access the mongodb server with the private IP(PIP), there won't be this problem.

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