使用LockSupport异常没有释放锁，导致死锁

本文主要是介绍使用LockSupport异常没有释放锁，导致死锁，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

##死锁代码

public class LockSupportThreadTest {public static void main(String[] args) {LockSupportThreadTest threadTest = new LockSupportThreadTest();Thread yym_user_thread2 = new Thread() {public void run() {LockSupport.park();System.out.println("yym_user_thread2");threadTest.resources(2);}};Thread yym_user_thread1 = new Thread() {public void run() {System.out.println("yym_user_thread1");threadTest.resources(0);LockSupport.unpark(yym_user_thread2);}};yym_user_thread1.setName("yym_user_thread1");yym_user_thread1.start();//Thread.yield();Thread.yield();Thread.yield();Thread.yield();Thread.yield();Thread.yield();yym_user_thread2.setName("yym_user_thread2");yym_user_thread2.start();}public void resources(int number) {int i = 10/number;System.out.println("resources"+i);}}

##jstack查看死锁原因，yym_user_thread2没有其他线程唤醒

"yym_user_thread2" #27 prio=5 os_prio=0 cpu=0.00ms elapsed=96.06s tid=0x0000022b79380000 nid=0x35784 waiting on condition  [0x00000070d84ff000]java.lang.Thread.State: WAITING (parking)at jdk.internal.misc.Unsafe.park(java.base@11.0.19/Native Method)at java.util.concurrent.locks.LockSupport.park(java.base@11.0.19/LockSupport.java:323)at com.newland.mi.thread.LockSupportThreadTest$1.run(LockSupportThreadTest.java:11)

##以上死锁产生原因，还是由于代码书写不规范产生。在finally释放锁

try {threadTest.resources(0);}finally {LockSupport.unpark(yym_user_thread2);}

这篇关于使用LockSupport异常没有释放锁，导致死锁的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

---