Mailing-List: contact mapreduce-issues-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Date: Wed, 2 Aug 2017 09:54:00 +0000 (UTC)
From: "Peter Bacsko (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Message-ID: <JIRA.13059812.1490726723000.72225.1501667640496@Atlassian.JIRA>
In-Reply-To: <JIRA.13059812.1490726723000@Atlassian.JIRA>
References: <JIRA.13059812.1490726723000@Atlassian.JIRA> <JIRA.13059812.1490726723394@jira-lw-us.apache.org>
Subject: [jira] [Updated] (MAPREDUCE-6870) Add configuration for MR job to
 finish when all reducers are complete (even with unfinished mappers)
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
archived-at: Wed, 02 Aug 2017 09:54:06 -0000


     [ https://issues.apache.org/jira/browse/MAPREDUCE-6870?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Peter Bacsko updated MAPREDUCE-6870:
------------------------------------
    Attachment: MAPREDUCE-6870-003.patch

> Add configuration for MR job to finish when all reducers are complete (even with unfinished mappers)
> ----------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6870
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6870
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 2.6.1
>            Reporter: Zhe Zhang
>            Assignee: Peter Bacsko
>         Attachments: MAPREDUCE-6870-001.patch, MAPREDUCE-6870-002.patch, MAPREDUCE-6870-003.patch
>
>
> Even with MAPREDUCE-5817, there could still be cases where mappers get scheduled before all reducers are complete, but those mappers run for long time, even after all reducers are complete. This could hurt the performance of large MR jobs.
> In some cases, mappers don't have any materialize-able outcome other than providing intermediate data to reducers. In that case, the job owner should have the config option to finish the job once all reducers are complete.


--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

---------------------------------------------------------------------
To unsubscribe, e-mail: mapreduce-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: mapreduce-issues-help@hadoop.apache.org