[HDFS-6831] Inconsistency between 'hdfs dfsadmin' and 'hdfs dfsadmin -help'

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.6.0
• Labels: newbie
• Hadoop Flags: Reviewed
• Assignee: Xiaoyu Yao
• Reporter: Akira Ajisaka
• Created: 07/Aug/14 04:53
• Updated: 01/Dec/14 03:10
• Resolved: 05/Sep/14 17:47

Description

There is an inconsistency between the console outputs of 'hdfs dfsadmin' command and 'hdfs dfsadmin -help' command.

[root@trunk ~]# hdfs dfsadmin
Usage: java DFSAdmin
Note: Administrative commands can only be run as the HDFS superuser.
           [-report]
           [-safemode enter | leave | get | wait]
           [-allowSnapshot <snapshotDir>]
           [-disallowSnapshot <snapshotDir>]
           [-saveNamespace]
           [-rollEdits]
           [-restoreFailedStorage true|false|check]
           [-refreshNodes]
           [-finalizeUpgrade]
           [-rollingUpgrade [<query|prepare|finalize>]]
           [-metasave filename]
           [-refreshServiceAcl]
           [-refreshUserToGroupsMappings]
           [-refreshSuperUserGroupsConfiguration]
           [-refreshCallQueue]
           [-refresh]
           [-printTopology]
           [-refreshNamenodes datanodehost:port]
           [-deleteBlockPool datanode-host:port blockpoolId [force]]
           [-setQuota <quota> <dirname>...<dirname>]
           [-clrQuota <dirname>...<dirname>]
           [-setSpaceQuota <quota> <dirname>...<dirname>]
           [-clrSpaceQuota <dirname>...<dirname>]
           [-setBalancerBandwidth <bandwidth in bytes per second>]
           [-fetchImage <local directory>]
           [-shutdownDatanode <datanode_host:ipc_port> [upgrade]]
           [-getDatanodeInfo <datanode_host:ipc_port>]
           [-help [cmd]]

[root@trunk ~]# hdfs dfsadmin -help
hadoop dfsadmin performs DFS administrative commands.
The full syntax is: 

hadoop dfsadmin
	[-report [-live] [-dead] [-decommissioning]]
	[-safemode <enter | leave | get | wait>]
	[-saveNamespace]
	[-rollEdits]
	[-restoreFailedStorage true|false|check]
	[-refreshNodes]
	[-setQuota <quota> <dirname>...<dirname>]
	[-clrQuota <dirname>...<dirname>]
	[-setSpaceQuota <quota> <dirname>...<dirname>]
	[-clrSpaceQuota <dirname>...<dirname>]
	[-finalizeUpgrade]
	[-rollingUpgrade [<query|prepare|finalize>]]
	[-refreshServiceAcl]
	[-refreshUserToGroupsMappings]
	[-refreshSuperUserGroupsConfiguration]
	[-refreshCallQueue]
	[-refresh <host:ipc_port> <key> [arg1..argn]
	[-printTopology]
	[-refreshNamenodes datanodehost:port]
	[-deleteBlockPool datanodehost:port blockpoolId [force]]
	[-setBalancerBandwidth <bandwidth>]
	[-fetchImage <local directory>]
	[-allowSnapshot <snapshotDir>]
	[-disallowSnapshot <snapshotDir>]
	[-shutdownDatanode <datanode_host:ipc_port> [upgrade]]
	[-getDatanodeInfo <datanode_host:ipc_port>
	[-help [cmd]

These two outputs should be the same.