Give me a hand, pls!

I'm building a app, i can explain briefly about it:
1 - i create a gateway, it'll recieve all message from client then process it
2- when gateway recieve a message, it create a thread to process it:
2-1: create a connection to another server( core-Server)
2-2: recieve response message, process it then send it to client
2-3: the problem is when gateway send a message to core-Server, if core-Server doesnt reply in 10seconds, we must close that connection to core-Server and reply to client the error-code
I have try to use Timer to do it, but nothing useful, please give me a solution!

Socket.setSoTimeout()

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