[hibernate-dev] ORM & Java 9 - strange javadoc failure

I worked on getting Travis CI set up on ORM for reasons discussed here previously. But I am running into a really strange error when I enabled Java 9: javadoc: error - An exception occurred while building a component: ClassSerializedForm (com.sun.tools.javac.code.Symbol$CompletionFailure: class file for org.hibernate.engine.Mapping not found) Please file a bug against the javadoc tool via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database ( http://bugs.java.com) for duplicates. Include error messages and the following diagnostic in your report. Thank you. com.sun.tools.javac.code.Symbol$CompletionFailure: class file for org.hibernate.engine.Mapping not found It seems like javadoc is complaining because it sees a reference to a class (org.hibernate.engine.Mapping) that it cannot find. It is true that there is no class named org.hibernate.engine.Mapping, the real name is org.hibernate.engine.spi.Mapping - but what is strange is that I search the entire ORM project and found zero references to the String org.hibernate.engine.Mapping. I just kicked off a run of the ORM / Java 9 Jenkins job to see if it has the same failure. Anyone have any ideas?