1.关闭集群
stop-dfs.sh
stop-yarn.sh
2.将集群中每个datanode节点的VERSION删除
(VERSION里面记录着datanodeid信息 路径/hadoop/tmp/dfs/data/current)
cd /usr/local/hadoop/tmp/dfs/data/current/
ls
rm -f VERSION
3.执行hdfs namenode -format (格式化语句)
hdfs namenode -format
4.重启集群
start-dfs.sh
start-yarn.sh