[HADOOP-415] DFSNodesStatus() should sort data nodes.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.4.0
• Fix Version/s: 0.5.0
• Assignee: Unassigned
• Reporter: Konstantin Shvachko
• Created: 02/Aug/06 01:38
• Updated: 08/Jul/09 16:41
• Resolved: 04/Aug/06 20:01

Description

HADOOP-392 introduced a new TreeMap member (datanodeMapByName) in the name node.
It is used solely for reporting the data nodes in the UI sorted by their names.
I think it is quite inefficient both time and space-wise to support an excessive
data structure just for that.
Suppose the UI will also require sorting by last heartbeat and/or by the available space....
I think DFSNodesStatus() should just sort the original datanodeMap before returning the list.