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POWhy was task1 thread not interrupted
 

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  1. POWhy was task1 thread not interrupted
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    <p>Assume the below code is executed with a debugger so that we can predict the order of execution.</p> <ul> <li>t1 -- Here task1 starts working on some long task.</li> <li>t2 --- task2 gets blocked @ Syncronized statement because task1 is holding lock.</li> <li>t3 -- task2 is interrupted but its missed because task2 is using intrinsic locks and hence cannot be interrupted @ synchronized. (Renenterant.lockInterruptible() would have thrown InterruptedExecption).</li> <li>t4 --- task1 is interrupted. However despite of doing the complex task in try catch block, InterruptedExecption was never thrown. Why is that ?</li> </ul> <p>Code:</p> <pre><code>public class TestInteruptibility { public static Object lock = new Object(); public static boolean spin = true; public static void main(String[] args) { Thread task1 = new Thread(new Task(), "Task1"); Thread task2 = new Thread(new Task(), "Task2"); Thread notifier1 = new Thread(new Notifier(), "Notifier1"); task1.start(); task2.start(); task2.interrupt(); task1.interrupt(); notifier1.start(); } } class Task implements Runnable { public void run() { synchronized (TestInteruptibility.lock) { System.out.println("Performing Long Task"); try { while (TestInteruptibility.spin) { } System.out.println("Finsihed Performing Long Task"); TestInteruptibility.lock.wait(); } catch (InterruptedException e) { e.printStackTrace(); System.out.println("I got interrupted while i was waiting @ wait()"); } System.out.println("Ending Task"); } } } class Notifier implements Runnable { public void run() { synchronized (TestInteruptibility.lock) { System.out.println("Performing notification"); TestInteruptibility.lock.notify(); System.out.println("Ending notification"); } } } </code></pre>
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    1. USJim Garrison
    1. USdeepujain
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    1. CO`spin` is never false, the loop never terminates and you never see "Finsihed [sic] Performing Long Task".
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      1. USerickson
 

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