Building the joyent/manta-monitor with JAVA 11, out of the box results in complie time errors something like:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.0:compile (default-compile) on project manta-monitor: Compilation failure
[ERROR] /Users/sachingupta/Documents/Joyent/java-manta-monitor/manta-monitor/src/main/java/com/joyent/manta/monitor/JettyServerBuilderModule.java:[18,8] cannot access java.lang.Object
[ERROR] bad class file: /modules/java.base/java/lang/Object.class
[ERROR] class file has wrong version 55.0, should be 53.0
[ERROR] Please remove or make sure it appears in the correct subdirectory of the classpath.