Thanks @smdas  We found that the problem with the Balancer is due to the strategy preset by hbase.master.loadbalancer.class that causes the abnormal RegionServer to fail to return to the balance. The final solution is to temporarily set hbase.master.loadbalancer.class=org.apache.hadoop.hbase.master.balancer.SimpleLoadBalancer.   After restarting HBase, the abnormal RegionServer successfully returned to balance. And finally canceled the parameters back to the original state, the abnormal situation did not appear again. ... View more