An existing connection was forcibly closed by the remote host.

[cmoles]

Hello,

We're using a websocket client on a few servers, and we're experiencing this OnError event with the following message after a day or several days of running smoothly -- sometimes all of them within minutes of each other:

System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
--- End of inner exception stack trace ---
at System.Net.Security._SslStream.EndRead(IAsyncResult asyncResult)
at System.Net.Security.SslStream.EndRead(IAsyncResult asyncResult)
at SuperSocket.ClientEngine.AuthenticatedStreamTcpSession.OnDataRead(IAsyncResult result),System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
--- End of inner exception stack trace ---
at System.Net.Security._SslStream.EndRead(IAsyncResult asyncResult)
at System.Net.Security.SslStream.EndRead(IAsyncResult asyncResult)
at SuperSocket.ClientEngine.AuthenticatedStreamTcpSession.OnDataRead(IAsyncResult result)

Our server's logs don't show any network issues or traffic anywhere near the times we experience this error.

Do you know what may be triggering it? We don't know how to recreate the issue, but it's been happening around once or twice a month.

[kerryjiang]

It seems like a certificate issue? Did you check the logs of server side?