Mailing-List: contact hadoop-dev-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: hadoop-dev@lucene.apache.org
Message-ID: <13430714.1194587330805.JavaMail.jira@brutus>
Date: Thu, 8 Nov 2007 21:48:50 -0800 (PST)
From: "Arun C Murthy (JIRA)" <jira@apache.org>
To: hadoop-dev@lucene.apache.org
Subject: [jira] Commented: (HADOOP-2175) Blacklisted hosts may not be able
 to serve map outputs
In-Reply-To: <17457660.1194564410785.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-2175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12541236 ] 

Arun C Murthy commented on HADOOP-2175:
---------------------------------------

Runping, the work we did on HADOOP-1158 should take care of situations like this one, no?

If you are satisfied, I'll close this issue...

> Blacklisted hosts may not be able to serve map outputs
> ------------------------------------------------------
>
>                 Key: HADOOP-2175
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2175
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Runping Qi
>            Assignee: Arun C Murthy
>
> After a node fails 4 mappers (tasks), it is added to blacklist thus it will no longer accept tasks.
> But, it will continue serve the map outputs of any mappers that ran successfully there. 
> However, the node may not be able serve the map outputs either. 
> This will cause the reducers to mark the corresponding map outputs as from slow hosts, 
> but continue to try to get the map outputs from that node.
> This may lead to waiting forever.

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