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No warning starting Jetty on port already in use (on Windows)
This is a peculiarity of the implementation of the ServerSocketChannel on the Windows platform and effects the SelectChannelConnector. See also the Sun bug 4546610.
The work around is to use the setReuseAddress(false) on the SelectChannelConnector. By default, this value is set to [true], and enables the socket option [SO_REUSEADDRESS]. This means that a socket may be opened, even if there is previous close (ie the port is in [TIME_WAIT] state) still pending on that socket. Setting it to [false] does not permit the socket to be re-opened in that state, but it also allows an Exception to be thrown if the socket is in use, eg by another Jetty instance.