I'm receiving this error frequently on my solr while indexing.
"$type": "System.Web.Http.HttpError, System.Web.Http",
"Message": "An error has occurred.",
"ExceptionMessage": "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
xx.xx.xx.xxx (Ip of the machine)",
"StackTrace": " at
at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)\r\n at
System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket
s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state,
IAsyncResult asyncResult, Exception& exception)"