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From "John George (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8014) ViewFileSystem does not correctly implement getDefaultBlockSize, getDefaultReplication, getContentSummary
Date Thu, 29 Mar 2012 13:54:30 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13241246#comment-13241246
] 

John George commented on HADOOP-8014:
-------------------------------------

I will attach a patch with the unit test fixes and addressing comment from Daryn. The following
is the basic theme that this patch follows. Suggestions and comments welcome:

- {{getDefaultBlockSize}}, {{getDefaultReplication}} and {{getServerDefaults}} APIs with no
{{path}} argument is invalid as far as viewFS is concerned. The logic behind this is that
viewFS has no 'default' mount point. Even in cases where {{ROOT_PATH}} is mounted, my thinking
is that it is not the 'default' mountpoint. Hence, viewFS will throw an exception in such
cases.

- Any call with {{path}} argument given, will be resolved accordingly and the corresponding
FS routing will be called.

                
> ViewFileSystem does not correctly implement getDefaultBlockSize, getDefaultReplication,
getContentSummary
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-8014
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8014
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.23.0, 0.23.2, 0.24.0
>            Reporter: Daryn Sharp
>            Assignee: John George
>         Attachments: HADOOP-8014.patch, HADOOP-8014.patch
>
>
> {{ViewFileSystem}} incorrectly returns the {{FileSystem}} default values for {{getDefaultBlockSize()}}
and {{getDefaultReplication()}}.  This causes files to be created with incorrect values. 
The problem is that the current apis are insufficient for viewfs because the defaults depend
on the underlying mount point.  These methods need counterparts that accept a {{Path}} so
viewfs can resolve the mount point for a path.

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