Re: [rules-users] NoClassDefFoundError for BaseObjectClassFieldExtractor when running in Tomcat

The NoClassDefFoundError exception is thrown from within drools code, so it's obviously in the classpath. The problem appears to be with the mechanism used by drools to load it's own code. Jesse On Wed, 2007-18-07 at 02:14 -0300, Fernando Meyer wrote: > You should add the drools-core library as a required dependency. > > Fernando Meyer http://fmeyer.org > fmcamargo(a)gmail.com > PGP: 0xD804DDFB > > > > > > On Jul 17, 2007, at 9:55 AM, Jesse Stockall wrote: > >> Tomcat 5.5 >> Java 1.5 >> jbossrules-4.0.0.12865MR3 >> >> I have an instance of Drools running inside a webapp deployed on >> Tomcat. The rules have been compiled ahead of time and are loaded >> in with: >> >> InputStream is = PolicyRuntime.class.getResourceAsStream(name); >> DroolsObjectInputStream in = new DroolsObjectInputStream(is); >> Package p = (Package) in.readObject(); >> >> When run outside Tomcat it loads fine, when run inside Tomcat I get: >> >> java.lang.NoClassDefFoundError: org/drools/base/extractors/ >> BaseObjectClassFieldExtractor >> at java.lang.ClassLoader.defineClass1(Native Method) >> at java.lang.ClassLoader.defineClass(ClassLoader.java:620) >> at org.drools.base.ClassFieldExtractorFactory >> $ByteArrayClassLoader.defineClass(ClassFieldExtractorFactory.java: >> 455) >> at >> org.drools.base.ClassFieldExtractorFactory.getClassFieldExtractor >> (ClassFieldExtractorFactory.java:114) >> at org.drools.base.ClassFieldExtractor.init >> (ClassFieldExtractor.java:77) >> at org.drools.base.ClassFieldExtractor.<init> >> (ClassFieldExtractor.java:57) >> at org.drools.base.ClassFieldExtractorCache.getExtractor >> (ClassFieldExtractorCache.java:35) >> at org.drools.base.ClassFieldExtractor.readResolve >> (ClassFieldExtractor.java:72) >> >> I've tried adding DroolsObjectInputStream.class.getClassLoader >> () , PolicyRuntime.class.getClassLoader() and Thread.currentThread >> ().getContextClassLoader() to the constructor of the >> DroolsObjectInputStream but none had any effect. >> >> Thanks >> >> Jesse >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users