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POException during start.dfs.sh
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  1. POException during start.dfs.sh
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    copied!<p>I set up a two node cluster using hadoop.</p> <p>When I run <code>start-dfs.sh</code> I got this error:</p> <pre><code>starting namenode, logging to /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-mohit-ubuntu.out slave: starting datanode, logging to /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-balaji-ubuntu.out slave: Exception in thread “main” java.lang.NoClassDefFoundError: org/apache/hadoop/util/PlatformName slave: Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.util.PlatformName slave: at java.net.URLClassLoader$1.run(URLClassLoader.java:202) slave: at java.security.AccessController.doPrivileged(Native Method) slave: at java.net.URLClassLoader.findClass(URLClassLoader.java:190) slave: at java.lang.ClassLoader.loadClass(ClassLoader.java:307) slave: at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) slave: at java.lang.ClassLoader.loadClass(ClassLoader.java:248) slave: Could not find the main class: org.apache.hadoop.util.PlatformName. Program will exit. slave: Exception in thread “main” java.lang.NoClassDefFoundError: org/apache/hadoop/hdfs/server/datanode/DataNode master: starting datanode, logging to /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-mohit-ubuntu.out master: starting secondarynamenode, logging to /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-mohit-ubuntu.out </code></pre> <p>After getting this error I changed the <code>HADOOP_CLASSPATH</code> to <code>export HADOOP_CLASSPATH=${HADOOP_CLASSPATH}:$HADOOP_HOME/lib/commons*.jar:$HADOOP_HOME:$HADDOP_HOME/hadoop-core-0.20.203.0.jar:$HADOOP_HOME/conf</code></p> <p>But it didn't help.</p>
 

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