[HDFS-6832] Fix the usage of 'hdfs namenode' command

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.4.1
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Labels: newbie
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Assignee: Manjunath Ballur
• Reporter: Akira Ajisaka
• Created: 07/Aug/14 05:00
• Updated: 30/Aug/16 01:41
• Resolved: 18/Feb/16 16:37

Description

[root@trunk ~]# hdfs namenode -help
Usage: java NameNode [-backup] | 
	[-checkpoint] | 
	[-format [-clusterid cid ] [-force] [-nonInteractive] ] | 
	[-upgrade [-clusterid cid] [-renameReserved<k-v pairs>] ] | 
	[-upgradeOnly [-clusterid cid] [-renameReserved<k-v pairs>] ] | 
	[-rollback] | 
	[-rollingUpgrade <downgrade|rollback> ] | 
	[-finalize] | 
	[-importCheckpoint] | 
	[-initializeSharedEdits] | 
	[-bootstrapStandby] | 
	[-recover [ -force] ] | 
	[-metadataVersion ]  ]

There're some issues in the usage to be fixed.

1. "Usage: java NameNode" should be "Usage: hdfs namenode"
2. -rollingUpgrade started option should be added
3. The last ']' should be removed.