This seems to be a cause of compiled classes in JVB. The commands you are
using to exec JVB are only compiling the java files, you need to clean
compile the code and regenerate target folder. Use following command for
the same >> JVB & Jicofo -> *mvn clean compile
exec*:java -Dexec.args="--host=localhost .....
Hope this will help.
Reply me in case of further concern