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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3327) Shufflinge fetachers waited too long between map output fetch re-tries
Date Fri, 02 May 2008 08:03:55 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12593734#action_12593734
] 

Amar Kamat commented on HADOOP-3327:
------------------------------------

bq. How do you know when the fetch of a map output was scheduled first?
Look for the first occurrence of '_Copying  task_200804301615_0003_m_000756_0 output from_'
in the reducer logs.
{quote} 
Why do you even need to confirm the time for first notification?
It is obvious that the re-try/backoff strategy is flawed.
{quote}
Agreed. But the main cause of the problem needs to detected and fixed. Its just the we should
be sure that what we are fixing is really broken.

> Shufflinge fetachers waited too long between map output fetch re-tries
> ----------------------------------------------------------------------
>
>                 Key: HADOOP-3327
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3327
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Runping Qi
>


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