Github user justinleet commented on the issue:
https://github.com/apache/incubator-metron/pull/389
@dlyle65535 Any preference on making any of the warnings into compile-time
errors? Specifically:
SynchronizeOnNonFinalField, BoxedPrimitiveConstructor, ClassCanBeStatic,
and ClassNewInstance
Notably, BoxedPrimitiveConstructor and ClassNewInstance both address issues
with using code that'll be deprecated in Java 9 anyway.
They can be done with a pretty simple POM edit, e.g.
<compilerArgs>
<arg>-Xlint:unchecked</arg>
<arg>-Xep:SynchronizeOnNonFinalField:ERROR</arg>
<arg>-Xep:BoxedPrimitiveConstructor:ERROR</arg>
<...>
</compilerArgs>
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