Question

为什么当线程池中的一个线程抛出RejectedExecutionException时主线程没有停止？我在这里做错了什么？线程池中的第三个线程抛出RejectedExecutionException，我没有在主线程中处理此异常。所以，我必须处理此异常，以使我的主线程停止。任何帮助，将不胜感激。

    public static void main(String[] args) {
        ExecutorService threadPool = new ThreadPoolExecutor(1, 1, 0L, TimeUnit.MILLISECONDS,
                new ArrayBlockingQueue<Runnable>(1));
        threadPool.execute(new TestOne());
        threadPool.execute(new TestTwo());
        threadPool.execute(new TestThree());
        threadPool.shutdown();
        try {
            threadPool.awaitTermination(2L, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println("main thread stopped");
    }
}

class TestOne implements Runnable {
    public void run() {
        for (int i = 0; i < 10; i++) {
            System.out.println("Executing task one");
            try {
                Thread.sleep(10);
            } catch (Throwable e) {
                e.printStackTrace();
            }
        }

    }
}

class TestTwo implements Runnable {
    public void run() {
        for (int i = 0; i < 10; i++) {
            System.out.println("Executing task two");
            try {
                Thread.sleep(10);
            } catch (Throwable e) {
                e.printStackTrace();
            }
        }
    }
}

class TestThree implements Runnable {
    public void run() {
        for (int i = 0; i < 10; i++) {
            System.out.println("Executing task three");
            try {
                Thread.sleep(10);
            } catch (Throwable e) {
                e.printStackTrace();
            }
        }
    }
}

Answer 1

线程池中没有线程抛出RejectedExecutionException。将任务提交给线程池的主要线程实际上是抛出RejectedExecutionException。

主要线程不会在提交时阻止，因为规范规定它不应该。有机制可以做到这一点，请参阅 ThreadPoolExecutor Block When Queue Is Full?

在RejectedExecutionException之后调用线程不会停止

1 个答案: