java.net.BindException: Address already in use: Cannot bind
at java.net.PlainDatagramSocketImpl.bind0(Native Method)
at java.net.PlainDatagramSocketImpl.bind(Unknown Source)
at java.net.DatagramSocket.bind(Unknown Source)
at java.net.DatagramSocket.<init>(Unknown Source)
at java.net.DatagramSocket.<init>(Unknown Source)
at java.net.DatagramSocket.<init>(Unknown Source)
at Discovery.<init>(Discovery.java:35)
at Main.main(Main.java:9)
Exception in thread "main" java.lang.NullPointerException
at Discovery.sendDiscoveryMsg(Discovery.java:72)
at Main.main(Main.java:10)
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