Why would a “java.net.ConnectException: Connection timed out” exception occur when URL is up?

Connection timeouts (assuming a local network and several client machines) typically result from a) some kind of firewall on the way that simply eats the packets without telling the sender things like “No Route to host” b) packet loss due to wrong network configuration or line overload c) too many requests overloading the server d) … Read more

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