hadoop安全模式

1：[root@ungeo8 bin]# hadoop dfs -rmr helloabc

DEPRECATED: Use of this script to execute hdfs command is deprecated.

Instead use the hdfs command for it.

12/10/03 18:19:47 INFO security.Groups: Group mapping impl=org.apache.hadoop.security.ShellBasedUnixGroupsMapping; cacheTimeout=300000

12/10/03 18:19:52 WARN conf.Configuration: mapred.task.id is deprecated. Instead, use mapreduce.task.attempt.id

rmr: Cannot delete /user/root/helloabc. Name node is in safe mode.

 

解决方法：

[root@ungeo8 hadoop]# bin/hadoop dfsadmin -safemode leave

DEPRECATED: Use of this script to execute hdfs command is deprecated.

Instead use the hdfs command for it.

12/10/03 18:25:39 INFO security.Groups: Group mapping impl=org.apache.hadoop.security.ShellBasedUnixGroupsMapping; cacheTimeout=300000

12/10/03 18:25:39 WARN conf.Configuration: mapred.task.id is deprecated. Instead, use mapreduce.task.attempt.id

Safe mode is OFF

[root@ungeo8 hadoop]# bin/hadoop dfs -rmr helloabc

DEPRECATED: Use of this script to execute hdfs command is deprecated.

Instead use the hdfs command for it.

12/10/03 18:26:49 INFO security.Groups: Group mapping impl=org.apache.hadoop.security.ShellBasedUnixGroupsMapping; cacheTimeout=300000

12/10/03 18:26:50 WARN conf.Configuration: mapred.task.id is deprecated. Instead, use mapreduce.task.attempt.id

Deleted hdfs://0.0.0.0:9000/user/root/helloabc

[root@ungeo8 hadoop]#

bin/hadoop dfsadmin -safemode leave   ##绝对可以使用，已经测试过了！

或

bin/hadoop fsck /               ##这个命令有人说可以，但我运行该命令后，还是不能删除目录，暂时记录下了！

附件是hadoop安全模式的解释，摘于hadoop权威指南