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https://issues.apache.org/jira/browse/HADOOP-1980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656859#action_12656859
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Raghu Angadi commented on HADOOP-1980:
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This does not preclude from setting a very large extension.
This patch only brings consistent behavior to '-safemode enter'. Once you enter
safemode manually, it makes good sense for it to require a manual command to
leave. It should not matter weather it is already in safemode or not.
> 'dfsadmin -safemode enter' should prevent the namenode from leaving safemode
> automatically after startup
> --------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-1980
> URL: https://issues.apache.org/jira/browse/HADOOP-1980
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Reporter: Koji Noguchi
> Assignee: Raghu Angadi
> Priority: Minor
> Attachments: HADOOP-1980.patch
>
>
> When debugging, I'd like to be able to intentionally keep the FS in a
> safemode. (For example, when looking at HADOOP-1978).
> Also, it'll be nice if the namenode can still update the webUI/report when it
> hits the dfs.safemode.threshold.pct.
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