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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