Thanks Harsh, I got it working, the problem for me is the java home, I reinstall java and point the java home to the new one, then it worked.
Thanks, Boyu On Wed, Jun 5, 2013 at 7:22 PM, Harsh J <[email protected]> wrote: > Do not use HADOOP_HOME anymore. Try removing the below line (and any > other references in your env to HADOOP_HOME): > > export HADOOP_HOME="/hadoop-2.0.4-alpha" > > On Thu, Jun 6, 2013 at 1:18 AM, Boyu Zhang <[email protected]> wrote: > > Dear All, > > > > I just moved from version 0.20.2 to 2.0.4, there are a lot of changes > Hadoop > > has been going through! > > > > I followed the instructions here: > > > http://hadoop.apache.org/docs/r2.0.4-alpha/hadoop-project-dist/hadoop-common/SingleCluster.html > > > > I changed the hadoop-2.0.4-alpha/etc/hadoop/hadoop-env.sh: > > > > export JAVA_HOME="/usr" > > export HADOOP_HOME="/hadoop-2.0.4-alpha" > > export HADOOP_COMMON_HOME="/hadoop-2.0.4-alpha/share/hadoop/common" > > export HADOOP_HDFS_HOME="/hadoop-2.0.4-alpha/share/hadoop/hdfs" > > export HADOOP_MAPRED_HOME="/hadoop-2.0.4-alpha/share/hadoop/mapreduce" > > export HADOOP_YARN_HOME="/hadoop-2.0.4-alpha/share/hadoop/mapreduce" > > > > But when I tried to format the namenode using: bin/hdfs namenode > -format, I > > got the following error: > > > > Exception in thread "main" 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$1.run(URLClassLoader.java:217) > > at java.security.AccessController.doPrivileged(Native Method) > > at java.net.URLClassLoader.findClass(URLClassLoader.java:205) > > at java.lang.ClassLoader.loadClass(ClassLoader.java:323) > > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) > > at java.lang.ClassLoader.loadClass(ClassLoader.java:268) > > at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:336) > > Could not find the main class: > > org.apache.hadoop.hdfs.server.namenode.NameNode. Program will exit. > > > > I tried to add the jar files in the /share/hadoop/common, hdfs, mapreduce > > into the CLASSPATH, but still I get the same error. > > > > Could anyone give any directions on what may go wrong? > > > > Thanks, > > Boyu > > > > -- > Harsh J >
