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https://issues.apache.org/jira/browse/HADOOP-2373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12579990#action_12579990
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Tsz Wo (Nicholas), SZE commented on HADOOP-2373:
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- reportStatus(String msg, boolean rightNow) need to be synchronized to protect
lastStatusReport.
- timeInSafemode/1000 => String.format("%0.2d", timeInSafemode/1000.0).
- Similarly, use String.format(...) for other floating point output in
getTurnOffTip().
> Name node silently changes state
> --------------------------------
>
> Key: HADOOP-2373
> URL: https://issues.apache.org/jira/browse/HADOOP-2373
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.16.0
> Reporter: Robert Chansler
> Assignee: Konstantin Shvachko
> Fix For: 0.17.0
>
> Attachments: SafeModeReport.patch
>
>
> 1. The name node should create a log message when entering the "extension"
> period of safe mode after achieving the minimal replication threshold.
> Logging state changes is a Good Idea. When diagnosing 2159, there is no
> evidence whether the name node is in the extension period or not.
> 2. When in safe mode, the name node should periodically explain _why_ it is
> still in safe mode. (2159 again)
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