Network Issues with Visual Studio Online Application Insgihts

My team is using Visual Studio Application Insights to monitor availability of our web server (we use cloud service)by making a call to it every 5 minutes from different locations around the world including Singapore, Japan, France and Switzerland.
We experienced continuous failures of this monitoring from Singapore from September, 19-th and the issue became very big on September 21-st, September, 22-nd. After that on September, 23-rd and 24-th we have failures form Paris. Then starting from September,
24-th to September, 26 we have very high percent of failures from Japan. Our problems finished with one more failure coming from Switzerland on September, 26.
I wanted to find what the source of the problem is since we checked our code and it very simple to cause network issues. However, it is very difficult to reproduce the issue. My questions is - were all these problems coming from Visual Studio Online Application
Insights?
One example error that it is tracked in Visual Studio Online Application Insights is:
System.Net.WebException: Unable to connect to the remote 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 138.91.9.51:8080
   at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at Microsoft.VisualStudio.TestTools.WebStress.WebTestTransaction.ResponseReceived(IAsyncResult result)
   at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
Thank you!
Kanio

Hello Kanio,
There is nothing AI-specific in the stack, and, since the exception was reported to the portal, I would say that AI was working that time. However, if the issues goes away as soon as you disable AI - then it might mean that the issue is induced by AI presence.
Also, you can try the latest AI SDK (0.13 as of today) and see if the issue still happens.
Dmitry Matveev

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