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https://issues.apache.org/jira/browse/HDFS-1508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13409858#comment-13409858
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Harsh J commented on HDFS-1508:
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I think this makes sense to go in, especially with the feature offered via
HDFS-1509.
Dhruba - Would you have some spare cycles to rebase the patch onto current
trunk? If not, I'll get it done by the week.
> Ability to do savenamespace without being in safemode
> -----------------------------------------------------
>
> Key: HDFS-1508
> URL: https://issues.apache.org/jira/browse/HDFS-1508
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Attachments: savenamespaceWithoutSafemode.txt,
> savenamespaceWithoutSafemode2.txt, savenamespaceWithoutSafemode3.txt,
> savenamespaceWithoutSafemode4.txt, savenamespaceWithoutSafemode5.txt
>
>
> In the current code, the administrator can run savenamespace only after
> putting the namenode in safemode. This means that applications that are
> writing to HDFS encounters errors because the NN is in safemode. We would
> like to allow saveNamespace even when the namenode is not in safemode.
> The savenamespace command already acquires the FSNamesystem writelock. There
> is no need to require that the namenode is in safemode too.
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