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Matan Safriel commented on KAFKA-797: ------------------------------------- Back to the original topic, David, the problem you encountered (Exception in thread "main" java.lang.NoClassDefFoundError: scala/ScalaObject) may seem to be related to Java not being able to run Scala on your machine. Can you share the versions of SBT and Java (java -version)? Also you may want to try in ./sbt: clean ++ 2.9.2 package HTH > Cannot start Kafka 0.8 per Quick Start instructions > --------------------------------------------------- > > Key: KAFKA-797 > URL: https://issues.apache.org/jira/browse/KAFKA-797 > Project: Kafka > Issue Type: Bug > Affects Versions: 0.8 > Reporter: David Arthur > > Checked out latest 0.8 (b5edbb193b33ebf0b3056935a537967ff21478a6), and ran: > ./sbt update > ./sbt package > Both complete successfully. Then I try to start the server: > $ ./bin/kafka-server-start.sh config/server.properties > Exception in thread "main" java.lang.NoClassDefFoundError: scala/ScalaObject > at java.lang.ClassLoader.defineClass1(Native Method) > at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) > at java.lang.ClassLoader.defineClass(ClassLoader.java:615) > at > java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) > at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) > at java.net.URLClassLoader.access$000(URLClassLoader.java:58) > at java.net.URLClassLoader$1.run(URLClassLoader.java:197) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:190) > at java.lang.ClassLoader.loadClass(ClassLoader.java:306) > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) > at java.lang.ClassLoader.loadClass(ClassLoader.java:247) > at java.lang.ClassLoader.defineClass1(Native Method) > at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) > at java.lang.ClassLoader.defineClass(ClassLoader.java:615) > at > java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) > at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) > at java.net.URLClassLoader.access$000(URLClassLoader.java:58) > at java.net.URLClassLoader$1.run(URLClassLoader.java:197) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:190) > at java.lang.ClassLoader.loadClass(ClassLoader.java:306) > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) > at java.lang.ClassLoader.loadClass(ClassLoader.java:247) > at kafka.Kafka.main(Kafka.scala) > Caused by: java.lang.ClassNotFoundException: scala.ScalaObject > at java.net.URLClassLoader$1.run(URLClassLoader.java:202) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:190) > at java.lang.ClassLoader.loadClass(ClassLoader.java:306) > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) > at java.lang.ClassLoader.loadClass(ClassLoader.java:247) > ... 25 more -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira