问题描述

通过redisson的lockAsync异步方法获取到锁之后，再业务执行完成后调用lock.unlockAsync()无法释放当前锁，导致后续的方法被阻塞

    public void asyncLock() {RLock lock = redissonClient.getLock("asyncLock");RFuture<Void> future = lock.lockAsync();future.whenComplete((res, exception) -> {System.out.println(Thread.currentThread().getName() + " 获取到锁 " + new Date());try {Thread.sleep(10000L);} catch (InterruptedException e) {throw new RuntimeException(e);}lock.unlockAsync().whenComplete((v, r) -> {System.out.println(Thread.currentThread().getName() + " 释放了锁 " + new Date());});});System.out.println(Thread.currentThread().getName() + " 其它操作..." + new Date());}

产生原因

释放锁的时候，当前如果没有传入线程id就会使用当前线程的id，由于当前方法是异步方法，和获取锁时的线程是不同的线程所以导致锁释放失败

    @Overridepublic RFuture<Void> unlockAsync() {long threadId = Thread.currentThread().getId();return unlockAsync(threadId);}

解决方法

调用unlockAsync() 方法时传入获取锁线程的线程id

    public void asyncLock() {RLock lock = redissonClient.getLock("asyncLock");RFuture<Void> future = lock.lockAsync();long threadId = Thread.currentThread().getId();future.whenComplete((res, exception) -> {System.out.println(Thread.currentThread().getName() + " 获取到锁 " + new Date());try {Thread.sleep(10000L);} catch (InterruptedException e) {throw new RuntimeException(e);}lock.unlockAsync(threadId).whenComplete((v, r) -> {System.out.println(Thread.currentThread().getName() + " 释放了锁 " + new Date());});});System.out.println(Thread.currentThread().getName() + " 其它操作..." + new Date());}