Mailing-List: contact core-dev-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: core-dev@hadoop.apache.org
Message-ID: <340555505.1238557610436.JavaMail.jira@brutus>
Date: Tue, 31 Mar 2009 20:46:50 -0700 (PDT)
From: "Amar Kamat (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Commented: (HADOOP-5337) JobTracker greedily schedules tasks
 without running tasks to join
In-Reply-To: <1347813205.1235650021736.JavaMail.jira@brutus>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/HADOOP-5337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12694368#action_12694368 ] 

Amar Kamat commented on HADOOP-5337:
------------------------------------

{{TestBackupNode}},  {{TestDatanodeBlockScanner}} passed on my box. {{TestCapacityScheduler}} fails on trunk.

> JobTracker greedily schedules tasks without running tasks to join
> -----------------------------------------------------------------
>
>                 Key: HADOOP-5337
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5337
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.20.0
>            Reporter: Karam Singh
>            Assignee: Amar Kamat
>         Attachments: HADOOP-5337-v1.11.patch, HADOOP-5337-v1.12.patch, HADOOP-5337-v1.7.patch, HADOOP-5337-v1.9.patch
>
>
> This issue was observed when JobTracker was restarted 3 times and observed that 4 instances of each reduce task were running. This issue is observed when cluster is not fully occupied.
> In testcase: Map/reduces capacity is 200/200 slots respectively and Job profile is 11000 maps, 10 reduces and speculative execution is off.  JobTracker was restarted 3 times in small intervals of about 5 mins and after recovery, 40 reduce tasks were running. Task details web page (taskdetails.jsp) was  showing 4 running attempts of each reduce task.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.