ASF Jenkins jersey tests failing with port in use exceptions.
The YARN-2912 patch tried to fix it, but it defaults to port 9998 and doesn't scan for a spare port —so is too brittle on a busy server
[JDK8] Set minimum version of Hadoop 3 to JDK 8
MapReduce JerseyTest tests failing with "java.net.BindException: Address already in use"
Jersey Tests failing with port in use