You are viewing a plain text version of this content. The canonical link for it is here.
Posted to mapreduce-dev@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2014/07/17 20:25:06 UTC
[jira] [Resolved] (MAPREDUCE-108) Blacklisted hosts may not be able
to serve map outputs
[ https://issues.apache.org/jira/browse/MAPREDUCE-108?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Allen Wittenauer resolved MAPREDUCE-108.
----------------------------------------
Resolution: Incomplete
I'm going to close this out as stale. Blacklisting has undergone quite a few changes in the past 6-7 years.
> Blacklisted hosts may not be able to serve map outputs
> ------------------------------------------------------
>
> Key: MAPREDUCE-108
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-108
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Runping Qi
> Assignee: Amar Kamat
> Attachments: HADOOP-2175-v1.1.patch, HADOOP-2175-v1.patch, HADOOP-2175-v2.patch, HADOOP-2175-v2.patch
>
>
> 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 was sent by Atlassian JIRA
(v6.2#6252)