下面的简短示例代码说明了我无法解释的行为

ConcurrentLinkedDeque<Double> testQueue = new ConcurrentLinkedDeque<>();

    Thread t = new Thread(() -> {
        long cnt = 0;
        try {
            while(!Thread.currentThread().isInterrupted()) {
                testQueue.add(Math.random());
                cnt++;
                try {
                    Thread.sleep(100);
                }catch (Exception e) {
                    System.out.println(String.format("inner interrupted inserted %d record", cnt));
                }
            }
        } catch (Exception e) {
            System.out.println(String.format("interrupted inserted %d record", cnt));
        }
        System.out.println(String.format("inserted %d record", cnt));
    });

如果我打电话 t.interrupt() 中断线程
预期的行为是2个打印行，表示：

inner interrupted inserted %d record
inserted %d record

其中%d替换为相应的值。
但实际结果是

inner interrupted inserted %d record

如果我们把线的内锁销去掉

ConcurrentLinkedDeque<Double> testQueue = new ConcurrentLinkedDeque<>();

    Thread t = new Thread(() -> {
        long cnt = 0;
        try {
            while(!Thread.currentThread().isInterrupted()) {
                testQueue.add(Math.random());
                cnt++;
                Thread.sleep(100);
            }
        } catch (Exception e) {
            System.out.println(String.format("interrupted inserted %d record", cnt));
        }
        System.out.println(String.format("inserted %d record", cnt));
    });

然后我们得到输出

interrupted inserted %d record
inserted %d record

正如预期的那样，外部catch正在捕获interruptexception
但是，如果我将break放在第一个代码示例的最内部catch中，如下所示：

ConcurrentLinkedDeque<Double> testQueue = new ConcurrentLinkedDeque<>();

    Thread t = new Thread(() -> {
        long cnt = 0;
        try {
            while(!Thread.currentThread().isInterrupted()) {
                testQueue.add(Math.random());
                cnt++;
                try {
                    Thread.sleep(100);
                }catch (Exception e) {
                    System.out.println(String.format("inner interrupted inserted %d record", cnt));
                    break; //this one
                }
            }
        } catch (Exception e) {
            System.out.println(String.format("interrupted inserted %d record", cnt));
        }
        System.out.println(String.format("inserted %d record", cnt));
    });

产生预期的行为。
为什么挡块的位置会产生这样的差异？