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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7659) fs -getmerge isn't guaranteed to work well over non-HDFS filesystems
Date Sun, 11 Dec 2011 20:34:40 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13167198#comment-13167198
] 

Hadoop QA commented on HADOOP-7659:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12506909/HADOOP-7659.patch
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    -1 javadoc.  The javadoc tool appears to have generated 5 warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed unit tests in .

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/465//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/465//console

This message is automatically generated.
                
> 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: Bug
>          Components: fs
>    Affects Versions: 0.20.204.0
>            Reporter: Harsh J
>            Assignee: Harsh J
>            Priority: Minor
>             Fix For: 0.24.0
>
>         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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