[MAPREDUCE-1242] Chain APIs error misleading

• Type: Bug
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 0.20.2
• Fix Version/s: 0.23.0
• Hadoop Flags: Reviewed
• Release Note: Fix a misleading exception message in case the Chained Mappers have mismatch in input/output Key/Value pairs between them.
• Assignee: Harsh J
• Reporter: Amogh Vasekar
• Created: 25/Nov/09 15:31
• Updated: 15/Nov/11 00:48
• Resolved: 04/Mar/11 04:53

Description

Hi,
I was using the Chain[Mapper/Reducer] APIs , and in Class Chain line 207 the error thrown :

"The Mapper output key class does not match the previous Mapper input key class"

Shouldn't this be "The Mapper input key class does not match the previous Mapper Output key class" ? Sort of misleads