Networking code sometimes throws UnknownHostException

Question

I am trying to data from a server. Sometimes my code fails due to an UnknownHostException. Why is that? What is the cause of this problem?

Answer 1

If the DNS resolution fails intermittently, catch the exception and try again until you get name resolution. You can only control, what you can control... And if you can't control/fix the DNS server, make your app robust enough to handle the quirky DNS server.