Andras Bokor created HADOOP-15252:
-------------------------------------

             Summary: Checkstyle version is not compatible with IDEA's 
checkstyle plugin
                 Key: HADOOP-15252
                 URL: https://issues.apache.org/jira/browse/HADOOP-15252
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Andras Bokor
            Assignee: Andras Bokor


After upgrading to the latest IDEA the IDE throws error messages in every few 
minutes like
{code:java}
The Checkstyle rules file could not be parsed.
SuppressionCommentFilter is not allowed as a child in Checker
The file has been blacklisted for 60s.{code}
This is caused by some backward incompatible changes in checkstyle source code:
 [http://checkstyle.sourceforge.net/releasenotes.html]
 * 8.1: Make SuppressionCommentFilter and SuppressWithNearbyCommentFilter 
children of TreeWalker.
 * 8.2: remove FileContentsHolder module as FileContents object is available 
for filters on TreeWalker in TreeWalkerAudit Event.

IDEA uses checkstyle 8.8

We should upgrade our checkstyle version to be compatible with IDEA's 
checkstyle plugin.
 Also it's a good time to upgrade maven-checkstyle-plugin as well to brand new 
3.0.



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