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Date: Tue, 30 Oct 2012 20:56:14 +0000 (UTC)
From: "Thomas Graves (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Message-ID: <2052549328.46772.1351630574771.JavaMail.jiratomcat@arcas>
Subject: [jira] [Created] (MAPREDUCE-4758) jobhistory web ui not showing
 correct # failed reducers
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Thomas Graves created MAPREDUCE-4758:
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             Summary: jobhistory web ui not showing correct # failed reducers
                 Key: MAPREDUCE-4758
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4758
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: jobhistoryserver, webapps
    Affects Versions: 0.23.4
            Reporter: Thomas Graves
            Priority: Critical


we had a job fail due to a reducer failing 4 times.  Unfortunately the job history UI didn't show  this particular failed reducer which lead to confusion as to why the job failed. 

This reducer failed to launch all 4 task attempts with a Token Expiration error and the jobhistory file only gets an event when the task attempt transitions to launched.  The webapp JobInfo object only counts the task attempts in the jobhistory file to display under the "Attempt Type" table, so since this task didn't have an attempt with it, it did show it on the UI.

We need to reconcile the task list with the task attempts or also shows more stats for the tasks vs task attempts.

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