Mailing-List: contact common-issues-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: common-issues@hadoop.apache.org
Date: Mon, 12 Nov 2012 22:57:13 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <299414138.103747.1352761033570.JavaMail.jiratomcat@arcas>
In-Reply-To: <289766885.90179.1352433732597.JavaMail.jiratomcat@arcas>
Subject: [jira] [Commented] (HADOOP-9022) Hadoop distcp tool fails to copy
 file if -m 0 specified
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/HADOOP-9022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13495725#comment-13495725 ] 

Hudson commented on HADOOP-9022:
--------------------------------

Integrated in Hadoop-trunk-Commit #3005 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/3005/])
    HADOOP-9022. Hadoop distcp tool fails to copy file if -m 0 specified (Jonathan Eagles vai bobby) (Revision 1408488)

     Result = SUCCESS
bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1408488
Files : 
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/DistCpOptions.java
* /hadoop/common/trunk/hadoop-tools/hadoop-distcp/src/test/java/org/apache/hadoop/tools/TestOptionsParser.java

                
> Hadoop distcp tool fails to copy file if -m 0 specified
> -------------------------------------------------------
>
>                 Key: HADOOP-9022
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9022
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.23.1, 0.23.3, 0.23.4
>            Reporter: Haiyang Jiang
>            Assignee: Jonathan Eagles
>             Fix For: 3.0.0, 2.0.3-alpha, 0.23.5
>
>         Attachments: HADOOP-9022.patch
>
>
> When trying to copy file using distcp on H23, if -m 0 is specified, distcp will just spawn 0 mapper tasks and the file will not be copied.
> But this used to work before H23, even when -m 0 specified, distcp will always copy the files.
> Checked the code of DistCp.java
> Before the rewrite, it set the number maps at least to 1
> job.setNumMapTasks(Math.max(numMaps, 1));
> But in the newest code, it just takes the input from user:
> job.getConfiguration().set(JobContext.NUM_MAPS,
>                   String.valueOf(inputOptions.getMaxMaps()));

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira