00:53:47,977 WARN namenode.NameNode: Encountered exception during format: java.io.IOException: Cannot remove current directory: /home/hadoop/tmp/dfs/name/current at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.clearDirectory(Storage.java:433) at org.apache.hadoop.hdfs.server.namenode.NNStorage.format(NNStorage.java:579) at org.apache.hadoop.hdfs.server.namenode.NNStorage.format(NNStorage.java:601) at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:173) at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1190) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1631) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1741) 00:53:47,979 ERROR namenode.NameNode: Failed to start namenode. java.io.IOException: Cannot remove current directory: /home/hadoop/tmp/dfs/name/current at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.clearDirectory(Storage.java:433) at org.apache.hadoop.hdfs.server.namenode.NNStorage.format(NNStorage.java:579) at org.apache.hadoop.hdfs.server.namenode.NNStorage.format(NNStorage.java:601) at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:173) at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1190) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1631) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1741) 00:53:47,980 INFO util.ExitUtil: Exiting with status 1: java.io.IOException: Cannot remove current directory: /home/hadoop/tmp/dfs/name/current 00:53:47,989 INFO namenode.NameNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at localhost/127.0.0.1 ************************************************************/
因为当前用户不是root，没有设置相关目录的权限 ：
chown -R hadoop:hadoop /home/hadoop
sudo chmod -R a+w /usr/local/hadoop3.1.0