Thank your for the report Joe. The InstanceManager class is in /usr/share/java/tomcat8-api.jar. It looks like this jar is missing from the classpath used by Eclipse. Did you use the version of eclipse currently in testing/unstable?
Emmanuel Bourg __ This is the maintainer address of Debian's Java team <http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-java-maintainers>. Please use debian-j...@lists.debian.org for discussions and questions.