Facebook OpenGraph API调用并非始终有效

我们时不时无法连接到Facebook OpenGraph API。 我们的.NET客户端返回以下错误：

System.Net.WebException:无法连接到远程服务器-->System.Net.Sockets.SocketException:连接尝试失败，因为连接方在一段时间后没有正确响应，或者建立的连接失败，因为连接的主机在System.Net.Sockets.Socket.DoConnection上未能响应66.220.146.100:443位于System.Net.ServicePoint.ConnectSocketInternal的System.Net.Sockets.Socket.InternalConnect（EndPoint remoteEP）处的（EndPoint endPointSnapshot，SocketAddress SocketAddress SocketAddress SocketAddress）处（EndPoint remoteEP）（布尔连接失败，套接字s4，套接字s6，套接字和套接字，IPAddress和address，ConnectSocketState状态，IAsyncResult asyncResult，Int32超时，异常和异常）

请注意，这不是特定于任何特定API调用的

甚至ping graph.facebook.com也会随机超时

以下是一些跟踪路由信息：

1 <1 ms <1 ms <1 ms ip-97-74-87-252.ip.secureserver.net [97.74.87.252]
2 <1 ms <1 ms <1 ms ip-208-109-113-173.ip.secureserver.net [208.109.113.173]
3 1 ms <1 ms <1 ms ip-97-74-252-21.ip.secureserver.net [97.74.252.21]
4 1 ms <1 ms <1 ms ip-97-74-252-21.ip.secureserver.net [97.74.252.21]
5 9 ms 1 ms 1 ms 206-15-85-9.static.twtelecom.net [206.15.85.9]
6 13 ms 13 ms 44 ms lax2-pr2-xe-1-3-0-0.us.twtelecom.net [66.192.241.218]
7 26 ms 28 ms 27 ms cr1.la2ca.ip.att.net [12.122.104.14]
8 26 ms 27 ms 27 ms cr82.sj2ca.ip.att.net [12.122.1.146]
9 23 ms 23 ms 23 ms 12.122.128.201
10 22 ms 22 ms 22 ms 12.249.231.26
11 22 ms 22 ms 22 ms ae1.bb02.sjc1.tfbnw.net [204.15.21.164]
12 23 ms 23 ms 23 ms ae5.dr02.snc4.tfbnw.net [204.15.21.169]
13 24 ms 23 ms 23 ms eth-17-2.csw02b.snc4.tfbnw.net [74.119.76.105]
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.

1相关错误报告：