I am trying to debug a .drl file using Eclipse mars (version Mars.2 Release (4.5.2)) and drools version 5.5.0.FINAL. I have added drools runtime. After running the Junit test as "Debug as Drools Junit test" , I got the following error.

An internal error occurred during: "Launching DroolsDummyTest.testHelloWorldRule (1)".
org.drools.eclipse.launching.DroolsVMDebugger.renderProcessLabel([Ljava/lang/String;)Ljava/lang/String;

This is the problem with incompatibility of drools and eclipse. I am able to debug other drools (version 5.5.0.FINAL) applications using Eclipse Helios. But, My current project is written in Java 7 which is not supported by Helios.

I am referring the link : http://docs.jboss.org/drools/release/5.5.0.Final/drools-expert-docs/html/ch06.html