Name node is in safe mode. Not able to leave
In order to forcefully let the namenode leave safemode, following command should be executed:
bin/hadoop dfsadmin -safemode leaveYou are getting Unknown command error for your command as -safemode isn't a sub-command for hadoop fs, but it is of hadoop dfsadmin.
Also after the above command, I would suggest you to once run hadoop fsck so that any inconsistencies crept in the hdfs might be sorted out.
Update:
Use hdfs command instead of hadoop command for newer distributions. The hadoop command is being deprecated:
hdfs dfsadmin -safemode leavehadoop dfsadmin has been deprecated and so is hadoop fs command, all hdfs related tasks are being moved to a separate command hdfs.
The Command did not work for me but the following did
hdfs dfsadmin -safemode leaveI used the hdfs command instead of the hadoop command.
Check out http://ask.gopivotal.com/hc/en-us/articles/200933026-HDFS-goes-into-readonly-mode-and-errors-out-with-Name-node-is-in-safe-mode- link too