Having a build configured to run with a matrix of JDK versions I’d expect java and javac to be of the same version.
Experiencing build failures in
that seem to be related to the mixup of versions:
$ java -Xmx32m -version openjdk version "1.8.0_141" OpenJDK Runtime Environment (build 1.8.0_141-8u141-b15-3~14.04-b15) OpenJDK 64-Bit Server VM (build 25.141-b15, mixed mode) $ javac -J-Xmx32m -version javac 9.0.1
A local build with JDK8 does not fail the animal-sniffer/maven-enforcer-plugin run but gives strange errors on Travis.
Is it possible to set/fix the versions via .travis.yml?
Can I launch a test build having the same JDK for java and javac to see if the build problems disappear on Travis?
Apache Software Foundations’s Jenkins (running with a fixed version of Java) does not have these problems:
https://builds.apache.org/view/A-D/view/Creadur/job/Creadur-Rat/
Any help appreciated 
Thanks