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From "Jothi Padmanabhan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-4714) map tasks timing out during merge phase
Date Mon, 01 Dec 2008 07:16:44 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-4714?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jothi Padmanabhan updated HADOOP-4714:
--------------------------------------

    Attachment: hadoop-4714-v1.patch

Attaching a patch that introduces a new parameter to control the number of records to process
before sending progress. The patch also modifies writeFile to send progress for each reducer
at the beginning as well. 

> map tasks timing out during merge phase
> ---------------------------------------
>
>                 Key: HADOOP-4714
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4714
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.18.1
>            Reporter: Christian Kunz
>            Assignee: Jothi Padmanabhan
>         Attachments: hadoop-4714-v1.patch, hadoop-4714.patch
>
>
> With compression of transient data turned on some parts of the merge phase seem to not
report progress enough.
> We see a lot of task failures during the merge phase, most of them timing out (even with
a 20 min timeout)

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