java ThreadPoolExecutor time-out not honored
<p>In my application we have used Thread pool, we have specified a timeout to the thread pool but it seems that the timeout is not called, below is the code :</p>

<pre><code>import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Date;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class ThreadPoolDemo extends Thread{

public void run(){
    System.out.println("Starting---" + new Timestamp((new Date()).getTime())  + "--" + Thread.currentThread().getName());
    try {
        Thread.sleep(30000);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    System.out.println("Finishing---" + new Timestamp((new Date()).getTime())  + "--" +Thread.currentThread().getName());
}

public static void main (String[] args){
    ArrayBlockingQueue&lt;Runnable&gt; threadQueue = new ArrayBlockingQueue&lt;Runnable&gt;(5);
    ThreadPoolExecutor thumbnailGeneratorThreadPool = new ThreadPoolExecutor(1, 3,
            5, TimeUnit.SECONDS, threadQueue);
    thumbnailGeneratorThreadPool.allowCoreThreadTimeOut(true);
    ArrayList fTasks = new ArrayList();
    for (int i = 0; i &lt; 15; i++) {
        System.out.println("Submitting Thread : " + (i+1) + "- Current Queue size is : " + threadQueue.size());
        ThreadPoolDemo tpd = new ThreadPoolDemo();
        Future future = thumbnailGeneratorThreadPool.submit(tpd);
    }
    }
}
</code></pre>

<p>The out put of the code is :</p>

<pre><code>Submitting Thread : 1- Current Queue size is : 0
Submitting Thread : 2- Current Queue size is : 0
Submitting Thread : 3- Current Queue size is : 1
Submitting Thread : 4- Current Queue size is : 2
Submitting Thread : 5- Current Queue size is : 3
Submitting Thread : 6- Current Queue size is : 4
Submitting Thread : 7- Current Queue size is : 5
Submitting Thread : 8- Current Queue size is : 5
Submitting Thread : 9- Current Queue size is : 5
Exception in thread "main" java.util.concurrent.RejectedExecutionException
    at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:1774)
    at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:768)
    at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:656)
    at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:78)
    at ThreadPoolDemo.main(ThreadPoolDemo.java:33)
Starting---2016-10-26 14:20:16.254--pool-1-thread-2
Starting---2016-10-26 14:20:16.254--pool-1-thread-3
Starting---2016-10-26 14:20:16.254--pool-1-thread-1
Finishing---2016-10-26 14:20:46.261--pool-1-thread-1
Finishing---2016-10-26 14:20:46.261--pool-1-thread-2
Finishing---2016-10-26 14:20:46.261--pool-1-thread-3
Starting---2016-10-26 14:20:46.261--pool-1-thread-2
Starting---2016-10-26 14:20:46.261--pool-1-thread-3
Starting---2016-10-26 14:20:46.261--pool-1-thread-1
Finishing---2016-10-26 14:21:16.265--pool-1-thread-1
Starting---2016-10-26 14:21:16.265--pool-1-thread-1
Finishing---2016-10-26 14:21:16.265--pool-1-thread-3
Starting---2016-10-26 14:21:16.265--pool-1-thread-3
Finishing---2016-10-26 14:21:16.265--pool-1-thread-2
Finishing---2016-10-26 14:21:46.277--pool-1-thread-1
Finishing---2016-10-26 14:21:46.277--pool-1-thread-3
</code></pre>

<p>Now in the <code>ThreadPoolExecutor</code> the <code>keepAliveTime</code> is set to 5 seconds.</p>

<p>However if we see the output the thread takes 30 seconds to complete. I'm not sure why the <code>InterruptedException</code> is not being called by the <code>ThreadPoolExecutor</code> on the thread.</p>

<p>I would like a mechanism to stop the threads if the thread is still active beyond the timeout specified.</p>