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

Question

I\'m getting a ConnectException: Connection timed out with some frequency from my code. The URL I am trying to hit is up. The same code works for some users,

Answer 1

• try to do the Telnet to see any firewall issue
• perform tracert/traceroute to find number of hops