转:一般是由于网络或者系统停止/重启造成的,通常不需要手动干预或者没有数据丢失。Level 0 和1 表示信息/提示;

That's happening due to problems in the network or system stop/restart.
normally it recovers without manual interventions and without data loss.
levels 0 and 1 signal it's an info / warning.