2014-04-17 11:44:06,200 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Invalid directory in dfs.data.dir: Incorrect permission for /hadoop_data/hadoop/hdfs/data/hadoop-hadoop, expected: rwxr-xr-x, while actual: rwxrwxr-x 2014-04-17 11:44:06,200 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: All directories in dfs.data.dir are invalid. 2014-04-17 11:44:06,201 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Exiting Datanode 2014-04-17 11:44:06,202 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: