Is Network Active

If your application is set to start on boot then there is a chance that it will start executing before the network is ready. Add this simple check before you perform any critical network tasks.

            if (!Network.isActive()) {
                System.out.println("Waiting for network");
                while (!Network.isActive()) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException ex) {
                        ex.printStackTrace(System.err);
                    }
                }
            }
            System.out.println("Network Ready");