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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2373) Name node silently changes state
Date Tue, 18 Mar 2008 18:37:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12579990#action_12579990
] 

Tsz Wo (Nicholas), SZE commented on HADOOP-2373:
------------------------------------------------

- 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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