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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1845) symlink comes up as directory after namenode restart
Date Wed, 20 Apr 2011 22:47:05 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13022406#comment-13022406

Eli Collins commented on HDFS-1845:

bq. Attaching Yahoo! specific patch for the bug.

Do you mean for branch-0.20-security? 

I think HDFS-1845-2.patch is equivalent to hdfs-1845-branch22-1.patch. 

> symlink comes up as directory after namenode restart
> ----------------------------------------------------
>                 Key: HDFS-1845
>                 URL: https://issues.apache.org/jira/browse/HDFS-1845
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.22.0, 0.23.0
>            Reporter: John George
>            Assignee: John George
>             Fix For: 0.22.0, 0.23.0
>         Attachments: HDFS-1845-2.patch, HDFS-1845-apache-2.patch, HDFS-1845-apache-3.patch,
HDFS-1845-apache.patch, hdfs-1845-branch22-1.patch
> When a symlink is first created, it get added to EditLogs. When namenode is restarted,
it reads from this editlog and represents a symlink correctly and saves this information to
its image. If the namenode is restarted again, it reads its from this FSImage, but thinks
that a symlink is a directory. This is because it uses "Block[] blocks" to determine if an
INode is a directory, a file, or symlink. Since both a directory and a symlink has blocks
as null, it thinks that a symlink is a directory.

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