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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7537) fsck is confusing when dfs.namenode.replication.min > 1 && missing replicas && NN restart
Date Thu, 26 Feb 2015 03:39:04 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7537?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo Nicholas Sze updated HDFS-7537:
--------------------------------------
    Hadoop Flags: Reviewed

+1 patch looks good.

> fsck is confusing when dfs.namenode.replication.min > 1 && missing replicas
&& NN restart
> -----------------------------------------------------------------------------------------
>
>                 Key: HDFS-7537
>                 URL: https://issues.apache.org/jira/browse/HDFS-7537
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>            Reporter: Allen Wittenauer
>            Assignee: GAO Rui
>         Attachments: HDFS-7537.1.patch, HDFS-7537.2.patch, Screen Shot 2015-02-26 at
10.27.46.png, Screen Shot 2015-02-26 at 10.30.35.png, dfs-min-2-fsck.png, dfs-min-2.png
>
>
> If minimum replication is set to 2 or higher and some of those replicas are missing and
the namenode restarts, it isn't always obvious that the missing replicas are the reason why
the namenode isn't leaving safemode.  We should improve the output of fsck and the web UI
to make it obvious that the missing blocks are from unmet replicas vs. completely/totally
missing.



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