[HADOOP-7300] Configuration methods that return collections are inconsistent about mutability

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.22.0
• Fix Version/s: 0.22.0
• Component/s: conf
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 18/May/11 17:52
• Updated: 19/May/11 13:30
• Resolved: 18/May/11 18:31

Description

In particular, getTrimmedStringCollection seems to return an immutable collection, whereas getStringCollection returns a mutable one.

IMO we should always return mutable collections since these methods by definition are doing copies.