Github user srdo commented on the issue:
https://github.com/apache/storm/pull/2316
@revans2 It's not the goal itself, it's because the apache-release profile
is activated
https://svn.apache.org/viewvc/maven/pom/tags/apache-10/pom.xml?view=markup#l298.
In the 10 version of the Apache parent the apache-release profile adds a
run of maven-source-plugin:jar, which forks the build and runs some phases
(e.g. validate) even if they've already run. This causes checkstyle to run
twice on all modules, which is usually not a problem. In storm-sql-core it
happens to run both before and after some code generation, which breaks the
build because Checkstyle crashes when checking the generated code.
The 18 parent version switches to the jar-no-fork goal, which doesn't run
checkstyle multiple times.
Thanks for reviewing btw.
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