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    <p>Start closing sockets after a certain time has passed. If a socket has stayed open too long just close it down. You could do this in two ways:</p> <p>You could also put a time limit on how long the client takes to send you a request. If they don't sustain a certain level of throughput close em. That can be pretty easy to do in your read loop when your thread is reading the request by adding a System.currentTimeInMillis() at the start and compare to where you are as you loop. If it drifts past a certain limit they are shutdown and dropped. </p> <p>An alternative idea to this idea is possibly not reject them but let your thread return to the pool, but put the socket on a stack to watch. Let the bytes pile up and after they reached a certain size you can them pass them to a thread in the pool to process. This the hybrid approach to cut em off vs. maybe they aren't bad but slow.</p> <p>Another way to handle that is watch how long a thread has been working on a request, and if it's not finished within a time limit close the underlying socket. Then the thread will get a SocketException and it can shutdown and clean up.</p> <p>Here are some other ideas that mostly involve using outside hardware like firewalls, load balancers, etc.</p> <p><a href="https://security.stackexchange.com/questions/114/what-techniques-do-advanced-firewalls-use-to-protect-againt-dos-ddos/792#792">https://security.stackexchange.com/questions/114/what-techniques-do-advanced-firewalls-use-to-protect-againt-dos-ddos/792#792</a></p>
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    1. POHow do you prevent a denial of service from exhausting a thread pool on a socket server in Java?
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    1. COI've been looking at this all night and I have created a new branch in my repo to play with ideas. I ended up putting a similar solution to your "System.currentTimeInMillis()" except that I used Date.getTime(). Probably would be better to use System.currentTimeInMillis() though, because then I wouldn't have to instantiate Date on every iteration. I'll let you know how it goes.
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    2. COWorked out really well over the last month. The code is operating flawlessly and we have not had a recurrence of the DoS.
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