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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7659) fs -getmerge isn't guaranteed to work well over non-HDFS filesystems
Date Fri, 25 May 2012 14:50:25 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13283504#comment-13283504

Hudson commented on HADOOP-7659:

Integrated in Hadoop-Mapreduce-trunk-Commit #2307 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/2307/])
    HADOOP-7659. fs -getmerge isn't guaranteed to work well over non-HDFS filesystems (harsh)
(Revision 1342600)

     Result = FAILURE
harsh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1342600
Files : 
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/RawLocalFileSystem.java

> fs -getmerge isn't guaranteed to work well over non-HDFS filesystems
> --------------------------------------------------------------------
>                 Key: HADOOP-7659
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7659
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>    Affects Versions:
>            Reporter: Harsh J
>            Assignee: Harsh J
>            Priority: Minor
>             Fix For: 3.0.0
>         Attachments: HADOOP-7659.patch
> When you use {{fs -getmerge}} with HDFS, you are guaranteed file list sorting (part-00000,
part-00001, onwards). When you use the same with other FSes we bundle, the ordering of listing
is not guaranteed at all. This is cause of http://download.oracle.com/javase/6/docs/api/java/io/File.html#list()
which we use internally for native file listing.
> This should either be documented as a known issue on -getmerge help pages/mans, or a
consistent ordering (similar to HDFS) must be applied atop the listing. I suspect the latter
only makes it worthy for what we include - while other FSes out there still have to deal with
this issue. Perhaps we need a recommendation doc note added to our API?

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