Have you tried with OpenJDK? This sounds like a bug that will probably need to be reported upstream. Good luck getting someone to look at Spark these days, though. On Wed, May 28, 2014 at 5:32 AM, Maykel Franco <maykeldebian@xxxxxxxxx> wrote: > Hi, I have install the spark client xmpp. I works very well with > openfire, but suddenly when I exec spark: > > [maykel@maykel-arch ~]$ spark > Exception in thread "main" java.lang.NoClassDefFoundError: > com/install4j/runtime/Launcher > Caused by: java.lang.ClassNotFoundException: com.install4j.runtime.Launcher > at java.net.URLClassLoader$1.run(Unknown Source) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(Unknown Source) > at java.lang.ClassLoader.loadClass(Unknown Source) > at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) > at java.lang.ClassLoader.loadClass(Unknown Source) > Could not find the main class: com.install4j.runtime.Launcher. > Program will exit. > > [maykel@maykel-arch ~]$ echo $JAVA_HOME > /usr/lib/jvm/jre1.7.0_55 > > [maykel@maykel-arch ~]$ java -version > java version "1.7.0_55" > Java(TM) SE Runtime Environment (build 1.7.0_55-b13) > Java HotSpot(TM) 64-Bit Server VM (build 24.55-b03, mixed mode) > > Thanks in advanced.