I think jboss-xnio and undertow are only affected by this issue and presumably maven-compiler-plugin is to blame here.
I have found this upstream bug report https://issues.apache.org/jira/browse/MCOMPILER-235 which seems related. I can work around the FTBFS by disabling the annotation processing and passing -proc:none as an argument to the compiler plugin. However this isn't really a proper fix because those generated classes are then not part of the final jar file and this may cause several other issues. The upstream bug report claims that maven-compiler-plugin 3.1 works or explicitly setting useIncrementalCompilation to false. Not sure if this might help us. At the moment I don't see a way to fix this in jboss-xnio or undertow though. Markus
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