[HADOOP-14181] Add validation of DynamoDB region

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: HADOOP-13345
• Component/s: fs/s3
• Target Version/s: HADOOP-13345
• Assignee: Sean Mackrory
• Reporter: Sean Mackrory
• Created: 14/Mar/17 15:40
• Updated: 15/Mar/17 15:54
• Resolved: 15/Mar/17 15:01

Description

Currently you can configure a nonsensical AWS region for DynamoDB and it doesn't stop you - it'll just start using another region silently. I propose that we just check it's a valid region for the current SDK and throw an exception instead of proceeding.