PackageBuilderConfiguration line 156 swallows exception cause ------------------------------------------------------------- Key: JBRULES-997 URL: http://jira.jboss.com/jira/browse/JBRULES-997 Project: JBoss Rules Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 4.0.0.MR3 Reporter: Alexandre Gattiker Assigned To: Mark Proctor PackageBuilderConfiguration line 156: is: throw new RuntimeDroolsException( "Unable to load dialect '" + dialectClass + ":" + dialectName + "'" ); should be: throw new RuntimeDroolsException( "Unable to load dialect '" + dialectClass + ":" + dialectName + "'" , e); Symptom: When a required library is missing (such as mvel), an Exception "java.lang.RuntimeException: org.drools.RuntimeDroolsException: Unable to load dialect 'org.drools.rule.builder.dialect.java.JavaDialect:java'" is thrown. With the fix, it will say "Caused by: java.lang.NoClassDefFoundError: org/mvel/integration/VariableResolverFactory..." -- 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