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From "Jim Plush (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-979) FSImage should specify which dirs are missing when refusing to come up
Date Mon, 27 Jun 2011 19:05:47 GMT

    [ https://issues.apache.org/jira/browse/HDFS-979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13055699#comment-13055699
] 

Jim Plush commented on HDFS-979:
--------------------------------

sounds good Steve, I'll refactor items 1,2 and 3. I do think 3 would probably clean some of
the logic up so I'll take a crack at it. 

Also, for #1(code formatting) are you referring to the Sun standards for if spacing or is
there another doc I should take a look at?

> FSImage should specify which dirs are missing when refusing to come up
> ----------------------------------------------------------------------
>
>                 Key: HDFS-979
>                 URL: https://issues.apache.org/jira/browse/HDFS-979
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: 0.22.0
>            Reporter: Steve Loughran
>            Assignee: Jim Plush
>            Priority: Minor
>             Fix For: 0.23.0
>
>         Attachments: HDFS-979-take1.txt, HDFS-979-take2.txt
>
>
> When {{FSImage}} can't come up as either it has no data or edit dirs, it tells me this
> {code}
> java.io.IOException: All specified directories are not accessible or do not exist.
> {code}
> What it doesn't do is say which of the two attributes are missing. This would be beneficial
to anyone trying to track down the problem. Also, I don't think the message is correct. It's
bailing out because dataDirs.size() == 0 || editsDirs.size() == 0 , because a list is empty
-not because the dirs aren't there, as there hasn't been any validation yet.
> More useful would be
> # Explicit mention of which attributes are null
> # Declare that this is because they are not in the config

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