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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 Tue, 05 Dec 2017 04:20:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16277989#comment-16277989
] 

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

FAILURE: Integrated in Jenkins build HBase-Trunk_matrix #4170 (See [https://builds.apache.org/job/HBase-Trunk_matrix/4170/])
HBASE-18942 hbase-hadoop2-compat module ignores hadoop-3 profile (apurtell: rev 6d69fd9c7871ffc3878eefa307da0e49bb7205f5)
* (edit) hbase-hadoop2-compat/pom.xml


> 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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