Class java.net.NoRouteToHostException

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java.lang.Object
   |
   +----java.lang.Throwable
           |
           +----java.lang.Exception
                   |
                   +----java.io.IOException
                           |
                           +----java.net.SocketException
                                   |
                                   +----java.net.NoRouteToHostException

public class NoRouteToHostException** extends SocketException

Signals that an error occurred while attempting to connect a socket to a remote address and port. Typically, the remote host cannot be reached because of an intervening firewall, or if an intermediate router is down.