--- old/src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/DefaultCompressPlugin.java	2016-04-12 15:16:08.191052800 +0530
+++ new/src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/DefaultCompressPlugin.java	2016-04-12 15:16:07.321044100 +0530
@@ -125,7 +125,7 @@
                         zip = new ZipPlugin(resFilter);
                         break;
                     default:
-                        throw new PluginException("Invalid level " + level);
+                        throw new IllegalArgumentException("Invalid compression level " + level);
                 }
             } else {
                 ss = new StringSharingPlugin(resFilter);