Resin can't load sun.tools.javac.Main. Usually this means that the JDK
tools.jar is missing from the classpath, possibly because of using a JRE
instead of the JDK. You can either add tools.jar to the classpath or change
the compiler to an external one with <java compiler='javac'/> or jikes.
java.lang.ClassNotFoundException: sun.tools.javac.Main