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Date: Thu, 30 Dec 2010 18:05:47 -0500 (EST)
From: "Konstantin Shvachko (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Updated: (HDFS-884) DataNode makeInstance should report the
 directory list when failing to start up
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     [ https://issues.apache.org/jira/browse/HDFS-884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Konstantin Shvachko updated HDFS-884:
-------------------------------------

    Status: Patch Available  (was: Open)

> DataNode makeInstance should report the directory list when failing to start up
> -------------------------------------------------------------------------------
>
>                 Key: HDFS-884
>                 URL: https://issues.apache.org/jira/browse/HDFS-884
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node
>    Affects Versions: 0.22.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>             Fix For: 0.22.0
>
>         Attachments: HDFS-884.patch, HDFS-884.patch, InvalidDirs.patch
>
>
> When {{Datanode.makeInstance()}} cannot work with one of the directories in dfs.data.dir, it logs this at warn level (while losing the stack trace). 
> It should include the nested exception for better troubleshooting. Then, when all dirs in the list fail, an exception is thrown, but this exception does not include the list of directories. It should list the absolute path of every missing/failing directory, so that whoever sees the exception can see where to start looking for problems: either the filesystem or the configuration. 

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