[HADOOP-16556] Fix some LGTM alerts

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.3.0
• Fix Version/s: 3.3.0
• Component/s: common
• Assignee: Malcolm Taylor
• Reporter: Malcolm Taylor
• Created: 12/Sep/19 07:30
• Updated: 17/Dec/19 08:45
• Resolved: 19/Sep/19 15:03

Description

LGTM analysis of Hadoop has raised some alerts (https://lgtm.com/projects/g/apache/hadoop/?mode=tree). This issue is to fix some of the more straightforward ones.

Issue Links

• links to: GitHub Pull Request #1428