I don't think you ought to be using HADOOP_HOME anymore. Try "unset HADOOP_HOME" and then "export HADOOP_PREFIX=/opt/hadoop" and retry the NN command.
On Sun, Aug 11, 2013 at 8:50 AM, Jane Wayne <jane.wayne2...@gmail.com> wrote: > hi, > > i have downloaded and untarred hadoop v0.23.9. i am trying to set up a > single node instance to learn this version of hadop. also, i am following > as best as i can, the instructions at > http://hadoop.apache.org/docs/r0.23.9/hadoop-project-dist/hadoop-common/SingleCluster.html > . > > when i attempt to run ${HADOOP_HOME}/bin/hdfs namenode -format, i get the > following error. > > Error: Could not find or load main class > org.apache.hadoop.hdfs.server.namenode.NameNode > > the instructions in the link above are complete. they jump right in and > say, "assuming you have installed hadoop-common/hadoop-hdfs..." what does > this assumption even mean? how do we install hadoop-common and hadoop-hdfs? > > right now, i am running on CentOS 6.4 x64 minimal. my steps are the > following. > > 0. installed jdk 1.7 (Oracle) > 1. tar xfz hadoop-0.23.9.tar.gz > 2. mv hadoop-0.23.9 /opt > 3. ln -s /opt/hadoop-0.23.9 /opt/hadoop > 4. export HADOOP_HOME=/opt/hadoop > 5. export JAVA_HOME=/opt/java > 6. export PATH=${JAVA_HOME}/bin:${HADOOP_HOME}/bin:${PATH} > > any help is appreciated. -- Harsh J
