We have a "build" output folder in all our projects used for parallel builds by Gradle.
This folder is marked as Derived.
JBoss Tools Verification rules are run on the contents of this folder.
This wastes CPU cycles (degraded user experience due to slower feedback), and shows duplet validation errors (causing confusion).
This is probably similar in nature to https://issues.jboss.org/browse/JBIDE-784
It would be nice, if Derived folders could be excluded from the verification run.