Nothing complex here, you just don't have the the scala library on your classpath. It works just like any jar--if there is a dependency on classes in the jar it needs to be on the classpath.
On Mon, Aug 26, 2013 at 7:10 PM, David Williams <dwilli...@truecar.com>wrote: > Hi all, > > First let me say I have detailed the description of the issue I have in an > Stack Overflow Ticket here: > > > http://stackoverflow.com/questions/18455480/kafka-quickstart-java-lang-noclassdeffounderror-scala-scalaobject > > I am trying to build a small prototype for a project in which I want to > use Kafka. I am following this example: > > https://cwiki.apache.org/confluence/display/KAFKA/Consumer+Group+Example > > > However, when I compile and run the code I get this runtime exception. > What should I do to get a working prototype / example??? > > > Exception in thread "main" java.lang.reflect.InvocationTargetException > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:606) > at com.simontuffs.onejar.Boot.run(Boot.java:340) > at com.simontuffs.onejar.Boot.main(Boot.java:166) > Caused by: java.lang.NoClassDefFoundError: scala/ScalaObject > at java.lang.ClassLoader.defineClass1(Native Method) > at java.lang.ClassLoader.defineClass(ClassLoader.java:792) > at > com.simontuffs.onejar.JarClassLoader.defineClass(JarClassLoader.java:803) > at com.simontuffs.onejar.JarClassLoader.findClass(JarClassLoader.java:710) > at java.lang.ClassLoader.loadClass(ClassLoader.java:424) > at com.simontuffs.onejar.JarClassLoader.loadClass(JarClassLoader.java:630) > at java.lang.ClassLoader.loadClass(ClassLoader.java:357) > at java.lang.ClassLoader.defineClass1(Native Method) > at java.lang.ClassLoader.defineClass(ClassLoader.java:792) > at > com.simontuffs.onejar.JarClassLoader.defineClass(JarClassLoader.java:803) > at com.simontuffs.onejar.JarClassLoader.findClass(JarClassLoader.java:710) > at java.lang.ClassLoader.loadClass(ClassLoader.java:424) > at com.simontuffs.onejar.JarClassLoader.loadClass(JarClassLoader.java:630) > at java.lang.ClassLoader.loadClass(ClassLoader.java:357) > at java.lang.Class.getDeclaredMethods0(Native Method) > at java.lang.Class.privateGetDeclaredMethods(Class.java:2521) > at java.lang.Class.getDeclaredMethods(Class.java:1845) > at > org.springframework.core.type.StandardAnnotationMetadata.getAnnotatedMethods(StandardAnnotationMetadata.java:180) > at > org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:222) > at > org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:165) > at > org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:140) > at > org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:282) > at > org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:223) > at > org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:630) > at > org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:461) > at > org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:73) > ... 6 more > Caused by: java.lang.ClassNotFoundException: scala.ScalaObject > at com.simontuffs.onejar.JarClassLoader.findClass(JarClassLoader.java:713) > at java.lang.ClassLoader.loadClass(ClassLoader.java:424) > at com.simontuffs.onejar.JarClassLoader.loadClass(JarClassLoader.java:630) > at java.lang.ClassLoader.loadClass(ClassLoader.java:357) > ... 34 more > > -- > >
