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Posted to common-dev@hadoop.apache.org by "Runping Qi (JIRA)" <ji...@apache.org> on 2007/10/02 15:34:50 UTC
[jira] Commented: (HADOOP-1984) some reducer stuck at copy phase
and progress extremely slowly
[ https://issues.apache.org/jira/browse/HADOOP-1984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12531791 ]
Runping Qi commented on HADOOP-1984:
------------------------------------
The status of the stucked reducer:
reduce > copy (778 of 779 at 0.20 MB/s) >
> some reducer stuck at copy phase and progress extremely slowly
> --------------------------------------------------------------
>
> Key: HADOOP-1984
> URL: https://issues.apache.org/jira/browse/HADOOP-1984
> Project: Hadoop
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.14.0
> Reporter: Runping Qi
> Priority: Critical
>
> In many cases, some reducers got stuck at copy phase, progressing extremely slowly.
> The entire cluster seems doing nothing. This causes a very bad long tails of otherwise well tuned map/red jobs.
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