[ http://jira.jboss.com/jira/browse/JBRULES-378?page=all ] Mihai Florea updated JBRULES-378: --------------------------------- Description: When trying to run the HelloWorldExample from drools-samples, I ended up with the following error: java.lang.NoClassDefFoundError: org/eclipse/jdt/internal/compiler/env/INameEnvironment at org.drools.compiler.PackageBuilder.loadCompiler(Unknown Source) at org.drools.compiler.PackageBuilder.<init>(Unknown Source) at org.drools.compiler.PackageBuilder.<init>(Unknown Source) at org.drools.examples.HelloWorldExample.readRule(HelloWorldExample.java:49) at org.drools.examples.HelloWorldExample.main(HelloWorldExample.java:21) The "eclipse" part from the error message seemed quite to me strange since I specified it to use the Janino compiler with -Ddrools.compiler=JANINO -Ddrools.compiler.lnglevel=1.4 I was running the example from within Eclipse, having all the required libraries in classpath (not the DROOLS/JBoss Rules library, but the jar files added manually). Taking a look at "loadCompiler()" method in org.drools.compiler.PackageBuilder, I noticed a missing break in the switch statement, which is the cause of the problem IMHO. private void loadCompiler() { switch ( configuration.getCompiler() ) { case PackageBuilderConfiguration.JANINO : { if ( !"1.4".intern().equals( configuration.getJavaLanguageLevel() ) ) throw new RuntimeDroolsException( "Incompatible Java language level with selected compiler" ); compiler = JavaCompilerFactory.getInstance().createCompiler("janino"); } // I believe we should have a "break" statement at this line, unless we want the system properties to be ignored case PackageBuilderConfiguration.ECLIPSE : default : { EclipseJavaCompilerSettings eclipseSettings = new EclipseJavaCompilerSettings(); eclipseSettings.getMap().put( "org.eclipse.jdt.core.compiler.codegen.targetPlatform", configuration.getJavaLanguageLevel() ); eclipseSettings.getMap().put( "org.eclipse.jdt.core.compiler.source", configuration.getJavaLanguageLevel() ); compiler = new EclipseJavaCompiler( eclipseSettings ); } } } Adding the "break" and recompiling the library seemed to solve the problem, however now I am getting the same error message when trying to use the Eclipse compiler: -Ddrools.compiler=ECLIPSE -Ddrools.compiler.lnglevel=5.0 was: When trying to run the HelloWorldExample from drools-samples, I ended up with the following error: java.lang.NoClassDefFoundError: org/eclipse/jdt/internal/compiler/env/INameEnvironment at org.drools.compiler.PackageBuilder.loadCompiler(Unknown Source) at org.drools.compiler.PackageBuilder.<init>(Unknown Source) at org.drools.compiler.PackageBuilder.<init>(Unknown Source) at org.drools.examples.HelloWorldExample.readRule(HelloWorldExample.java:49) at org.drools.examples.HelloWorldExample.main(HelloWorldExample.java:21) The "eclipse" part from the error message seemed quite to me strange since I specified it to use the Janino compiler with -Ddrools.compiler=JANINO -Ddrools.compiler.lnglevel=1.4 I was running the example from within Eclipse, having all the required libraries in classpath (not the DROOLS/JBoss Rules library, but the jar files added manually). Taking a look at "loadCompiler()" method in org.drools.compiler.PackageBuilder, I noticed a missing break in the switch statement, which is the cause of the problem IMHO. private void loadCompiler() { switch ( configuration.getCompiler() ) { case PackageBuilderConfiguration.JANINO : { if ( !"1.4".intern().equals( configuration.getJavaLanguageLevel() ) ) throw new RuntimeDroolsException( "Incompatible Java language level with selected compiler" ); compiler = JavaCompilerFactory.getInstance().createCompiler("janino"); } // I believe we should have a "break" statement at this line, unless we want the system properties to be ignored case PackageBuilderConfiguration.ECLIPSE : default : { EclipseJavaCompilerSettings eclipseSettings = new EclipseJavaCompilerSettings(); eclipseSettings.getMap().put( "org.eclipse.jdt.core.compiler.codegen.targetPlatform", configuration.getJavaLanguageLevel() ); eclipseSettings.getMap().put( "org.eclipse.jdt.core.compiler.source", configuration.getJavaLanguageLevel() ); compiler = new EclipseJavaCompiler( eclipseSettings ); } } } -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira