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Hello, I have configured hadoop install according to instructions I found on the internet; when I start hadoop namenode/datanode, I get: java.lang.NoClassDefFoundError: org/apache/hadoop/hdfs/server/namenode/NameNode Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hdfs.server.namenode.NameNode 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) Could not find the main class: org.apache.hadoop.hdfs.server.namenode.NameNode. Program will exit. Exception in thread "main" ulimit -a for user kdelia core file size (blocks, -c) unlimited data seg size (kbytes, -d) unlimited file size (blocks, -f) unlimited open files (-n) 256 pipe size (512 bytes, -p) 8 stack size (kbytes, -s) 2024 cpu time (seconds, -t) unlimited max user processes (-u) 256 virtual memory (kbytes, -v) unlimited hadoop classpath shows me: /home/kdelia/yarn/hadoop-2.2.0/etc/hadoop:/home/kdelia/yarn/hadoop-2.2.0/share/hadoop/common/lib/*:/home/kdelia/yarn/hadoop-2.2.0/share/hadoop/common/*:/home/kdelia/yarn/hadoop-2.2.0/share/hadoop/hdfs:/home/kdelia/yarn/hadoop-2.2.0/share/hadoop/hdfs/lib/*:/home/kdelia/yarn/hadoop-2.2.0/share/hadoop/hdfs/*:/home/kdelia/yarn/hadoop-2.2.0/share/hadoop/yarn/lib/*:/home/kdelia/yarn/hadoop-2.2.0/share/hadoop/yarn/*:/home/kdelia/yarn/hadoop-2.2.0/share/hadoop/mapreduce/lib/*:/home/kdelia/yarn/hadoop-2.2.0/share/hadoop/mapreduce/*:/home/kdelia/yarn/hadoop-2.2.0/contrib/capacity-scheduler/*.jar So, it appears that the libraries needed by the services can be found. Not sure why I am getting the class not found exception. I am using instructions from this site: http://raseshmori.wordpress.com/2012/09/23/install-hadoop-2-0-1-yarn-nextgen/ Thanks! -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJSi27WAAoJEIqFaT7R0oyMviwH/j+7398y+e+iHUILpPdxa4UW gYYh5OBPk+Ae8N1I+a5OsUOoZxxkcET2vZIChgbRe/S3k8xullrUYj5Y4rLHT8AF mDL/7U2+hpCX3E1TJeCetI/uyVgqtVsEyU6pwocYmnc7zIh3YpzFvahO40q7Iik9 4I5AHi6yFfmvHxdni/ZOgf/B8NS8NLVhmHxZcRFliXYZVyJsBTBpacTq8BY49i8n gGod7eIu/NZ6HuYJqn+vfrPhopfMFVKOAWy510KlbAarFm22KXOQTHciiIAqML6O +ChhE5mz1G2Oo5qYMvoi0/TxT+vTC5rOGCZ6sQn3/R4s0NvXJOwbdynSJGWSnbc= =2fuf -----END PGP SIGNATURE-----