[jboss-jira] [JBoss JIRA] Closed: (JBRULES-378) NoClassDefFoundError at org.drools.compiler.PackageBuilder.loadCompiler

NoClassDefFoundError at org.drools.compiler.PackageBuilder.loadCompiler ----------------------------------------------------------------------- Key: JBRULES-378 URL: http://jira.jboss.com/jira/browse/JBRULES-378 Project: JBoss Rules Issue Type: Bug Security Level: Public(Everyone can see) Components: Drl Parser/Builder Affects Versions: 3.0.2 Environment: -Linux 2.4.26; -Sun JDK 1.5.0_06; -Eclipse 3.2.0 M20060629-1905; -Jar classpath entries: antlr-2.7.6.jar antlr-3.0ea8.jar colt-1.2.0.jar commons-collections-3.1.jar commons-io-1.1.jar commons-jci-core-1.0-406301.jar commons-jci-eclipse-3.2.0.666.jar commons-jci-janino-2.4.3.jar commons-lang-2.1.jar commons-logging-api-1.0.4.jar concurrent-1.3.4.jar drools-compiler.jar drools-core.jar drools-decisiontables.jar drools-jsr94.jar janino-2.4.3.jar jsr94-1.1.jar jung-1.7.2.jar junit-3.8.1.jar poi-2.5.1-final-20040804.jar stringtemplate-2.3b6.jar xercesImpl-2.6.2.jar xml-apis-1.0.b2.jar xpp3-1.1.3.4.O.jar xstream-1.1.3.jar Reporter: Mihai Florea Assigned To: Mark Proctor 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