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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4502) WebHdfsFileSystem handling of ifile field breaks compatibility and breaks HttpFS
Date Mon, 18 Feb 2013 22:47:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13580867#comment-13580867
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Tsz Wo (Nicholas), SZE commented on HDFS-4502:
----------------------------------------------

Hi Alejandro, 

Yes, the fileId is an additional field.  Let's do not include it in the WebHDFS API for the
moment.

According to Section 5.4 in http://tools.ietf.org/id/draft-zyp-json-schema-03.html, the default
value of "additionalProperties" is an empty schema which allows any value for additional properties.
Therefore, all WebHDFS JSON responses allow any additional property since the WebHDFS REST
API do not specify additionalProperties.  However, I agree that it is better to clarify it.
 Filed HDFS-4513.
                
> WebHdfsFileSystem handling of ifile field breaks compatibility and breaks HttpFS
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-4502
>                 URL: https://issues.apache.org/jira/browse/HDFS-4502
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 3.0.0
>            Reporter: Alejandro Abdelnur
>            Assignee: Brandon Li
>            Priority: Blocker
>         Attachments: HDFS-4502.patch
>
>
> HDFS-4340 introduced a new field {{fileId}} in WebHDFS FileStatus JSON representation.
> There are a two issues with this:
> * This is changing the WebHDFS REST API, this has not been documented
> * WebHdfsFileSystem should not fail when that field is not present (This is the case
when using HttpFS against a FS implementation -other than HDFS- which does not handle fileId)

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