锁释放后Redisson条目不可用

Question

我正在使用 Redisson

RLock lock = redissonClient().getLock(key);
try {
  if (lock.tryLock()) {
   // Logic here
redissonClient().getMap().get("key"); // returns value
    lock.unlock();
  }
redissonClient().getMap().get("key"); // returns NULL
} catch (Exception e) {
  LOG.error("Error..", e);
} finally {
  if (lock != null && lock.isLocked() && lock.isHeldByCurrentThread()) {
    lock.unlock();
    LOG.debug("lock released");
  }
}

如果我不使用锁，一切都会按预期工作，但解锁后，返回的值始终为空。

Answer 1

RLock lock = redissonClient().getLock(key);
try {
    if (lock.tryLock()) {
        try {
            // Logic here
            Object value = redissonClient().getMap().get("key"); // returns value
            // Do something with the value
        } finally {
            // Ensure unlock is called in a finally block to guarantee it happens
            lock.unlock();
        }
    } else {
        // Handle the case where the lock couldn't be acquired
        LOG.info("Failed to acquire lock for key: {}", key);
    }
    // Here, after the lock is released, check if the value is still there
    Object valueAfterUnlock = redissonClient().getMap().get("key");
    if (valueAfterUnlock == null) {
        LOG.warn("Value for key {} is null after lock release", "key");
    }
} catch (Exception e) {
    LOG.error("Error occurred while processing with lock", e);
} finally {
    // This check is redundant here since we've already managed the lock in the try block
    // but it's good practice to ensure locks are released if for some reason they weren't earlier
    if (lock != null && lock.isLocked() && lock.isHeldByCurrentThread()) {
        lock.unlock();
        LOG.debug("Lock released manually");
    }
}