Troubleshooting method of CPU surge

1 Let's start with a soaring code

public class FindJavaThreadInTaskManager {
    public static void main(String[] args) {
        Thread thread = new Thread(new Worker());
        thread.start();
    }

    static class Worker implements Runnable {
        @Override
        public void run() {
            while (true) {
                System.out.println("Thread Name:" + Thread.currentThread().getName());
            }
        }
    }
}

2 、 Type the program as jar package t1.jar
3 、 Put it in linux Running on the server jar Package method
java -cp t1.jar test1.FindJavaThreadInTaskManager
4、 find CPU The process with high utilization rate , Get process number , here PID by 5735

5、top -Hp 5735

6、 take pid Turn into 16 Base number
printf %x 5747 =======》1673
7、 View the stack information of the current thread
./jstack 5735 |grep -A 200 1673