【科普系列】jstack排查死锁

• Z时代
• 2024-01-10
• 分类：综合

给个死锁的例子：

public class SomeThing {
    private static final Logger LOGGER = LoggerFactory.getLogger(SomeThing.class);
    private static Object resource1 = new Object();//资源 1
    private static Object resource2 = new Object();//资源 2
    public static void main(String[] args) {
        new Thread(() -> {
            synchronized (resource1) {
                System.out.println(Thread.currentThread() + "get resource1");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println(Thread.currentThread() + "waiting get resource2");
                synchronized (resource2) {
                    System.out.println(Thread.currentThread() + "get resource2");
                }
            }
        }, "线程 1").start();
        new Thread(() -> {
            synchronized (resource2) {
                System.out.println(Thread.currentThread() + "get resource2");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println(Thread.currentThread() + "waiting get resource1");
                synchronized (resource1) {
                    System.out.println(Thread.currentThread() + "get resource1");
                }
            }
        }, "线程 2").start();
    }
}

执行 ：jstack 21516

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