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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-3) Output directories are not cleaned up before the reduces run
Date Mon, 02 Oct 2017 01:14:03 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16187610#comment-16187610
] 

Hudson commented on HADOOP-3:
-----------------------------

SUCCESS: Integrated in Jenkins build HBase-1.1-JDK7 #1915 (See [https://builds.apache.org/job/HBase-1.1-JDK7/1915/])
HBASE-17441 Fix invalid quoting around hadoop-3 build in yetus (busbey: rev ea67acab70f87eb3a15119c2f4a393e2a12d8527)
* (edit) dev-support/hbase-personality.sh


> Output directories are not cleaned up before the reduces run
> ------------------------------------------------------------
>
>                 Key: HADOOP-3
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.1.0
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>            Priority: Minor
>             Fix For: 0.1.0
>
>         Attachments: clean-out-dir.patch, noclobber.patch
>
>
> The output directory for the reduces is not cleaned up and therefore if you can see left
overs from previous runs, if they had more reduces. For example, if you run the application
once with reduces=10 and then rerun with reduces=8, your output directory will have frag00000
to frag00009 with the first 8 fragments from the second run and the last 2 fragments from
the first run.



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