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From "Jason Meng" <neu...@126.com>
Subject How to upgrade Hadoop 2.2 to 2.4
Date Fri, 20 Jun 2014 09:50:00 GMT

I setup Hadoop 2.2 cluster with NameNode HA. How to upgrade it to 2.4? I try to upgrade according
to http://hadoop.apache.org/docs/r2.4.0/hadoop-project-dist/hadoop-hdfs/HdfsRollingUpgrade.html,
but can't works. Is there a detailed step by step guide include when to shutdown namenode
or when to change env variable like HADOOP_HOME in which step? There are two mode to upgrade,
cluster running or cluster stopped. Either one is ok. Thanks.

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