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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-1105) Reducers don't make "progress" while iterating through values
Date Mon, 02 Apr 2007 23:40:32 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Owen O'Malley updated HADOOP-1105:
----------------------------------

    Status: Open  (was: Patch Available)

This patch does the wrong thing:
  1. The new thread name is really long (minor complaint of course).
  2. The reduce will never get killed for failing to make progress, because the progress thread
will always call progress.
  3. It removes the calls to progress that were already there and fails to add the necessary
new one.

> Reducers don't make "progress" while iterating through values
> -------------------------------------------------------------
>
>                 Key: HADOOP-1105
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1105
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.12.0
>            Reporter: Owen O'Malley
>         Assigned To: Devaraj Das
>             Fix For: 0.12.3
>
>         Attachments: 1105.new1.patch, 1105.patch, 1105.patch
>
>
> Reduces make progress when they go to a new key, but not when they read the next value,
which could cause reduces to time out when they have a lot of values for the same key.

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