redis中的看门狗

在Redis中，看门狗（watchdog）是指Redisson提供的一种监控锁的机制。它的作用是在Redisson实例被关闭前，不断延长锁的有效期，防止锁超时被释放。看门狗会定期对锁进行续期操作，默认情况下每隔10秒就会将锁的有效期重置为30秒。这样，即使一个线程持有锁并没有完成逻辑，看门狗会不断延长锁的超时时间，确保锁不会因为超时而被释放。你还可以通过修改Redisson的配置项`Config.lockWatchdogTimeout`来自定义看门狗的超时时间。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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