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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9310) {FileSystem,FileContext}.getFileBlockLocations() are incompletely and incorrectly specified
Date Fri, 15 Feb 2013 16:11:15 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13579274#comment-13579274
] 

Steve Loughran commented on HADOOP-9310:
----------------------------------------

The current behaviour from the base class is (unintetionally?) to return an empty location
array on a directory.

This is a consequence of a directory having length 0, so the "gone off the end of the file"
logic kicks in
{code}
    if (status.getLen() <= start) {
      return new BlockLocation[0];
    }
{code}
                
> {FileSystem,FileContext}.getFileBlockLocations() are incompletely and incorrectly specified
> -------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9310
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9310
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>            Reporter: Steve Loughran
>
> The javadocs of the {{getFileBlockLocations()}} methods in {{FileSystem}} and {{FileContext}}
incorrectly specify the result when a nonexistent region is passed in (it's an empty array,
not null), and nowhere is the response to a call of the method against a directory defined.

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