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How to migrate Apache Hadoop 1.x HDFS to Apache Hadoop 2.x HDFS

+2 votes
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Apache Hadoop includes HDFS Federation.
Does anyone know how to migrate Apache Hadoop 1.x HDFS to Apache Hadoop 2.x HDFS?

I am getting the following error:

$ bin/hdfs start namenode --config $HADOOP_CONF_DIR -upgrade -clusterId 
Error: Could not find or load main class start 
posted Dec 3, 2013 by Kumar Mitrasen

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