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Date: Thu, 16 Dec 2010 11:34:27 +0530
From: sandeep <sandeepk@huawei.com>
Subject: Hadoop upgrade [Do we need to have same value for dfs.name.dir ]
 while
 upgrading
To: common-user@hadoop.apache.org
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HI ,

 
I am trying to upgrade hadoop ,as part of this i have set Two environment
variables NEW_HADOOP_INSTALL and OLD_HADOOP_INSTALL .

 
After this i have executed the following command %
NEW_HADOOP_INSTALL/bin/start-dfs -upgrade

 
But namenode didnot started as it was throwing Inconsistent state exception
as the dfs.name.dir is not present

 
Here My question is while upgrading do we need to have the same old
configurations like dfs.name.dir..etc

 
Or Do i need to format that namenode first and then start upgrading?

 
Please let me know

 
Thanks

sandeep

 
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