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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4044) Create symbolic links in HDFS
Date Wed, 10 Sep 2008 02:19:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12629680#action_12629680
] 

Konstantin Shvachko commented on HADOOP-4044:
---------------------------------------------

sanjay> merely the NN throws that exception.

May be a symlink exception from the NN is not bad, but wrapping the SymLink data inside the
exception seems to be a bad way of returning data back to the client. I mean this part of
the code proposed above does not look right
{code}
catch (SymLinkNotFollowedException e) {
        f = e.getSymLink();
}
{code}
I would definitely prefer to have a common base class returned as Doug proposes.

> Create symbolic links in HDFS
> -----------------------------
>
>                 Key: HADOOP-4044
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4044
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>         Attachments: symLink1.patch
>
>
> HDFS should support symbolic links. A symbolic link is a special type of file that contains
a reference to another file or directory in the form of an absolute or relative path and that
affects pathname resolution. Programs which read or write to files named by a symbolic link
will behave as if operating directly on the target file. However, archiving utilities can
handle symbolic links specially and manipulate them directly.

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