Github user cestella commented on a diff in the pull request:
https://github.com/apache/incubator-metron/pull/468#discussion_r103724085
--- Diff: metron-analytics/metron-profiler/pom.xml ---
@@ -339,6 +339,7 @@
</excludes>
</artifactSet>
<transformers>
+ <transformer
implementation="org.atteo.classindex.ClassIndexTransformer"/>
--- End diff --
A compiler annotation. By virtue of having metron-common as a dependency
and therefore ClassIndex as a transitive dependency, you get the compiler
annotation run automatically since is in `META-INF/services`
([here](https://github.com/atteo/classindex/blob/master/classindex/src/main/resources/META-INF/services/javax.annotation.processing.Processor)
).
This is an aspect of `javac`, not maven, so it should cross various build
mechanisms.
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