Hello all I try to install hadoop but I have a problem when trying to format data folder with command hdfs namenode -format Error Could not find or load main class Username

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Hello all! I try to install hadoop but I have a problem when trying to format data folder with command "hdfs namenode -format". Error: Could not find or load main class Username
Aug 13, 2020 in Big Data Hadoop by Kamaraj
 • 120 points • 2,185 views

Can you paste the whole output of your hdfs namenode -format command? Also, try the below command once.

$ bin/hadoop namenode -format
commented Aug 13, 2020 by MD
 • 95,460 points

1 answer to this question.

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Hi, @Kamaraj,

It looks like a path issue, just check in case you have added the following to your ~/.bashrc

export HADOOP_CLASSPATH=$(cygpath -pw $(hadoop classpath)):$HADOOP_CLASSPATH
answered Aug 13, 2020 by Gitika
 • 65,770 points

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