[HADOOP-6578] Configuration should trim whitespace around a lot of value types

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.22.0, 0.23.0
• Fix Version/s: 0.22.0, 0.23.0
• Component/s: conf
• Hadoop Flags: Reviewed
• Assignee: Michele Catasta
• Reporter: Todd Lipcon
• Created: 19/Feb/10 22:25
• Updated: 09/Aug/13 09:31
• Resolved: 04/Jan/11 05:30

Description

I've seen multiple users make an error where they've listed some whitespace around a class name (eg for configuring a scheduler). This results in a ClassNotFoundException which is very hard to debug, as you don't notice the whitespace in the exception! We should simply trim the whitespace in Configuration.getClass and Configuration.getClasses to avoid this class of user error.

Similarly, we should trim in getInt, getLong, etc - anywhere that whitespace doesn't have semantic meaning we should be a little less strict on input.

Issue Links

• is related to: HADOOP-9855 Backport HADOOP-6578 to branch-1