A problem with executing Java Agents was reported on the researchers mailing lists in the thread "using a java agent ":
I have problems with the classloader using a java agent. On a single
class, everything works fine, but on a jar, I get the following exception:
Failed to run the agent's premain: fullpath.Agent not found in SystemAppCL
java.lang.ClassNotFoundException: fullpath.Agent not found in SystemAppCL
-jar dacapo-2006-10.jar lusearch
in the terminal (same exception with every other .jar file).
I've taken a look at this and it seems that there aren't any separate repositories for Java agents. When the arguments are processed, the classpath of the agent is discarded when the -javaagent option is passed before the -jar option.