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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6984) MR AM to clean up temporary files from previous attempt in case of no recovery
Date Fri, 19 Jan 2018 21:24:01 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16332910#comment-16332910

Hudson commented on MAPREDUCE-6984:

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #13526 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/13526/])
MAPREDUCE-6984. MR AM to clean up temporary files from previous attempt (haibochen: rev cce71dceef9e82d31fe8ec59648b2a4a50c8869a)
* (edit) hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/MRAppMaster.java
* (edit) hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestRecovery.java

> MR AM to clean up temporary files from previous attempt in case of no recovery
> ------------------------------------------------------------------------------
>                 Key: MAPREDUCE-6984
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6984
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: applicationmaster
>    Affects Versions: 3.0.0-beta1
>            Reporter: Gergo Repas
>            Assignee: Gergo Repas
>            Priority: Major
>             Fix For: 3.1.0, 3.0.1, 2.10.0
>         Attachments: MAPREDUCE-6984.000.patch, MAPREDUCE-6984.001.patch, MAPREDUCE-6984.003.patch,
MAPREDUCE-6984.004.patch, MAPREDUCE-6984.005.patch, MAPREDUCE-6984.006.patch, MAPREDUCE-6984.007.patch,
MAPREDUCE-6984.008.patch, MAPREDUCE-6984.009.patch, MAPREDUCE-6984.010.patch
> When the MR AM restarts, the &#123;outputDir&#125;/_temporary/&#123;appAttemptNumber&#125;
directory remains on HDFS, even though this directory is not used during the next attempt
if the restart has been done without recovery. So if recovery is not used for the AM restart,
then the deletion of this directory can be done earlier (at the start of the next attempt).
The benefit is that more free HDFS space is available for the next attempt.

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