diff -r a8670a9b5135 glassfish.jruby/src/org/netbeans/modules/glassfish/jruby/JRubyServerModule.java
--- a/glassfish.jruby/src/org/netbeans/modules/glassfish/jruby/JRubyServerModule.java	Fri May 29 01:11:39 2009 +0400
+++ b/glassfish.jruby/src/org/netbeans/modules/glassfish/jruby/JRubyServerModule.java	Mon Jun 08 18:56:55 2009 -0700
@@ -459,7 +459,7 @@ public class JRubyServerModule implement
         // Define properties to enable rdebug inside Grizzly/JRuby adapter if
         // debugging is enabled.
         if(debug) {
-            builder.append(" -Djruby.reflection=true -Djruby.compile.mode=OFF");
+            builder.append(" -Djruby.reflection=true -Djruby.compile.mode=OFF -Djruby.debug.fullTrace=true");
             builder.append(
                     " -Dglassfish.rdebug=${rdebug.path}" +
                     " -Dglassfish.rdebug.port=${rdebug.port}" +
@@ -472,6 +472,9 @@ public class JRubyServerModule implement
 
         // Arguments to Grizzly/JRuby standalone server
         builder.append(" com.sun.grizzly.standalone.JRuby");
+        if(debug) {
+            builder.append(" --debug");
+        }
         builder.append(" -p ");
         builder.append(httpPort);
         builder.append(" -n 1 ");