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From Boyu Zhang <boyuzhan...@gmail.com>
Subject Re: ClassNotFound Error when use hdfs namenode -format in 2.0.4
Date Thu, 06 Jun 2013 02:42:39 GMT
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 <harsh@cloudera.com> 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 <boyuzhang35@gmail.com> 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
>

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