How to solve Java thread interrupt timeout exception (ThreadInterruptedTimeoutExceotion)

How to solve the Java thread interrupt timeout exception (ThreadInterruptedTimeoutException)

In Java multi-threaded programming, we often encounter situations where the thread execution time is too long. In order to prevent threads from occupying too many system resources, we usually set a timeout. When the thread execution time exceeds the timeout, we hope to be able to interrupt the execution of the thread.

Java provides a thread interruption mechanism. You can send an interrupt signal to the thread by calling the thread's interrupt() method. When we call the thread's interrupt() method, we do not immediately interrupt the execution of the thread, but issue an interrupt request to the thread and set the thread's interrupt flag bit to true. During execution, a thread can determine whether it has been interrupted by checking its own interrupt flag bit, and terminate its execution as needed.

In multi-threaded programming, sometimes we want to be able to wait for the result of an operation within the timeout period and interrupt the execution of the thread when the timeout period arrives. A common example is the handling of network request timeouts. We can solve this problem in the following ways.

First, we need to create a thread class to perform the operations we need to wait for. In this thread class, we need to use the sleep() method of the thread to simulate the operation we need to wait for.

public class MyThread implements Runnable {
    @Override
    public void run() {
        try {
            // 模拟需要等待的操作
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            // 线程被中断，做一些清理工作
            System.out.println("线程被中断");
        }
    }
}

Next, we create a main thread to start our thread and set a timeout.

public class Main {
    public static void main(String[] args) {
        MyThread myThread = new MyThread();
        Thread thread = new Thread(myThread);

        // 设置超时时间
        int timeout = 3000;

        // 启动线程
        thread.start();

        try {
            // 等待线程执行完毕或超时
            thread.join(timeout);

            // 如果线程未执行完毕，则中断线程
            if (thread.isAlive()) {
                thread.interrupt();
            }
       } catch (InterruptedException e) {
           e.printStackTrace();
       }
    }
}

In the above code, we use the join() method of the Thread class to wait for the thread to complete execution or timeout. If the thread completes execution, the join() method will return immediately; if the timeout period is exceeded and the join() method has not returned, we can think that the thread execution has timed out and interrupt the thread's execution by calling the thread's interrupt() method. .

In the above code, we use the sleep() method in the thread's run() method to simulate the waiting operation and set a larger waiting time (5000 milliseconds). In the main thread, we set a short timeout (3000 milliseconds). In this way, when the thread execution exceeds 3 seconds, we will interrupt the execution of the thread.

Through the above code, we can solve the problem of thread interrupt timeout in Java multi-thread programming. We can set different timeouts according to specific needs and use this method to handle thread execution timeouts. At the same time, we also need to properly handle thread interruptions in the thread's run() method and do some cleanup work to ensure the correct operation of the program.

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