[HADOOP-7890] Redirect hadoop script's deprecation message to stderr

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 0.23.0
• Fix Version/s: 0.23.1
• Component/s: scripts
• Hadoop Flags: Reviewed
• Assignee: Koji Noguchi
• Reporter: Koji Noguchi
• Created: 07/Dec/11 22:33
• Updated: 05/Mar/12 02:49
• Resolved: 21/Dec/11 19:36

Description

$ hadoop dfs -ls
DEPRECATED: Use of this script to execute hdfs command is deprecated.
Instead use the hdfs command for it.
...

If we're still letting the command run, I think we should redirect the deprecation message to stderr in case users have a script taking the output from stdout.