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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7537) dfs.namenode.replication.min > 1 && missing replicas && NN restart is confusing
Date Thu, 18 Dec 2014 22:04:14 GMT

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

Allen Wittenauer updated HDFS-7537:
-----------------------------------
    Attachment: dfs-min-2.png

> dfs.namenode.replication.min > 1 && missing replicas && NN restart
is confusing
> -------------------------------------------------------------------------------
>
>                 Key: HDFS-7537
>                 URL: https://issues.apache.org/jira/browse/HDFS-7537
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Allen Wittenauer
>         Attachments: 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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