问题: 配置Hadoop集群时,一个节点的DataNode无法启动 排查: 查看hadoop-root-datanode-bigdata114.log文件,错误信息如下: java.io.IOException: Incompatible clusterIDs in /root/training/hadoop-2.7.3/tmp/dfs/data: namenode clusterID = CID-947a48a2-56aa-4566-85d6-b5987d0bfeca; datanode cl…