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java.net.UnknownHostException: .. at java.net.InetAddress.getAllByName0(InetAddress.java:577) at java.net.InetAddress.getAllByName0(InetAddress.java:546) at java.net.InetAddress.getByName(InetAddress.java:455) at java.net.Socket.<init>(Socket.java:98) at sun.net.NetworkClient.doConnect(NetworkClient.java:54) at sun.net.NetworkClient.openServer(NetworkClient.java:42) at sun.net.ftp.FtpClient.openServer(FtpClient.java:271) at sun.net.ftp.FtpClient.<init>(FtpClient.java:385)