[travis] Travis CI add oraclejdk9 #1023
Merged
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Relates to #705
I had to also:
maven-compiler-plugin
to 3.6.2 or laterjdk.tools
from all Hadoop dependencies (especially transitive)Could not find artifact jdk.tools:jdk.tools:jar:1.6 at specified path /usr/lib/jvm/java-9-oracle/../lib/tools.jar