[YARN-8169] Cleanup RackResolver.java

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.1
• Fix Version/s: 3.2.0
• Component/s: yarn
• Hadoop Flags: Reviewed
• Flags: Patch
• Assignee: David Mollitor
• Reporter: David Mollitor
• Created: 17/Apr/18 15:41
• Updated: 19/Apr/18 07:45
• Resolved: 19/Apr/18 07:45

Description

1. Use SLF4J
2. Fix some checkstyle warnings
3. Minor clean up