hadoop 未啓動datanode

分別運行 start-dfs.sh, start-yarn.sh

jps後未發現 datanode

有

java.io.IOException: Incompatible clusterIDs in /opt/hadoop/hadoop-2.2.0/dfs/data: namenode clusterID = CID-b829ee60-d27d-4886-a39c-971c127f35bb; datanode clusterID = CID-75812c32-ccfb-4249-912c-ea073d26d321

修正：

rm -rf /opt/hadoop/hadoop-2.2.0/dfs/data/*

hadoop namenode -format

start-dfs.sh

start-yarn.sh

jps

datanode 順利啓動

詳細參考此文件點擊打開鏈接