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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4559) WebHDFS does not allow resolution of Symlinks
Date Thu, 07 Mar 2013 07:04:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13595623#comment-13595623
] 

Alejandro Abdelnur commented on HDFS-4559:
------------------------------------------

I agree with Suresh's comment. 

Furthermore, I think having CREATESYMLINK in WebHDFS is a mistake as it is not supported on
the FileSystem API. For example HTTPFS cannot support this for any FileSystem (including HDFS).
WebHDFS rides on the implementation detail that is running in the NN and can tap directly
there.

IMO, we should first add symlinks to the FileSystem API and then do proper support in WebHDFS
REST API.
                
> WebHDFS does not allow resolution of Symlinks
> ---------------------------------------------
>
>                 Key: HDFS-4559
>                 URL: https://issues.apache.org/jira/browse/HDFS-4559
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.0.3-alpha
>            Reporter: Plamen Jeliazkov
>            Assignee: Plamen Jeliazkov
>             Fix For: 3.0.0, 2.0.4-beta
>
>
> WebHDFS allows you to create symlinks via the CREATESYMLINK operation, but the GETFILEINFO
operation specifically calls the getFileInfo() method of the NameNodeRpcServer which does
not resolve symlinks.
> I propose adding a parameter to GETFILEINFO such that if true will call getFileLinkInfo()
rather than getFileInfo() which will resolve any symlinks.

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