[HADOOP-16771] Update checkstyle to 8.26 and maven-checkstyle-plugin to 3.1.0

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.0
• Fix Version/s: 3.3.0, 3.1.4, 3.2.2
• Component/s: build
• Hadoop Flags: Reviewed
• Release Note: Updated checkstyle to 8.26 and updated maven-checkstyle-plugin to 3.1.0.
• Assignee: Andras Bokor
• Reporter: Andras Bokor
• Created: 19/Dec/19 13:19
• Updated: 30/Jul/20 20:07
• Resolved: 20/Dec/19 04:13

Description

After upgrading to the latest IDEA the IDE throws error message when I try to load the checkstyle xml

TreeWalker is not allowed as a parent of LineLength Please review 'Parent Module' section for this Check in web documentation if Check is standard.

This is caused by some backward incompatible changes in checkstyle source code

IDEA uses checkstyle 8.26

We should upgrade our checkstyle version to be compatible with IDEA's checkstyle plugin which is the latest.
Also it's a good time to upgrade maven-checkstyle-plugin as well to 3.1.

Issue Links

• relates to: TEZ-4212 Fix build checkstyle configuration and suppressions dtd URLs