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https://issues.apache.org/jira/browse/HADOOP-1604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12514576
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Enis Soztutar commented on HADOOP-1604:
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A funny mistake, but once we have somehow "forgotten" to finalize the upgrade
from 0.9 to 0.13. We haven't realized this until DFS grew to use all the disk
space (because of the previous directories) . So it would be really
informative, if the UI and the command line logs show that the dfs is in the
status of upgrading, and it should the finalized, similar to the safety-mode
messages.
> admins should be able to finalize namenode upgrades without running the
> cluster
> -------------------------------------------------------------------------------
>
> Key: HADOOP-1604
> URL: https://issues.apache.org/jira/browse/HADOOP-1604
> Project: Hadoop
> Issue Type: New Feature
> Components: dfs
> Affects Versions: 0.14.0
> Reporter: Owen O'Malley
> Assignee: Konstantin Shvachko
> Priority: Critical
> Fix For: 0.14.0
>
>
> Currently a HDFS cluster must be running in order to finalize an upgrade, but
> if you shut down without finalizing the new software won't start up. I
> propose a command line option to the namenode that lets you finalize an
> upgrade with the cluster down.
> {code}
> % bin/hadoop namenode -finalize
> {code}
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