It appears that org.apache.karaf.admin.internal.AdminServiceImpl.java in module
org.apache.karaf.admin.core needs org.fusesource.jansi.Ansi.
However the pom file does not have a dependency it like this
<dependency>
<groupId>org.sonatype.jline</groupId>
<artifactId>jline</artifactId>
<scope>provided</scope>
</dependency>
I suspect it currently compiles due to a bug in the maven compiler plugin since
it is incorrectly picking up the above dependency transitively from
org.apache.karaf.shell.console.
--ming