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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2165) Augment JobHistory to store tasks' userlogs
Date Fri, 19 Sep 2008 09:26:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12632599#action_12632599
] 

Amar Kamat commented on HADOOP-2165:
------------------------------------

Few comments
1) Hostname is also written to the history and hence that can be used instead of extracting
it from the tracker-name.
2) Hostnames are always expected and hence we can avoid the check for their existence. If
hostnames are missing then its a bug and should not be masked.
3) Factor out the common code to do with getting the task-log url. I would prefer not to handcraft
it everywhere. May be in {{TaskTracker.java}}?

> Augment JobHistory to store tasks' userlogs
> -------------------------------------------
>
>                 Key: HADOOP-2165
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2165
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: Arun C Murthy
>            Assignee: Vinod K V
>             Fix For: 0.19.0
>
>         Attachments: HADOOP-2165-20080910.1.txt, HADOOP-2165-20080912.txt, HADOOP-2165-20080919.1.txt,
patch_userlog_1.4.3.txt
>
>
> It will be very useful to be able to see the job's userlogs (the stdout/stderr/syslog
of the tasks) from the JobHistory page. It will greatly aid in debugging etc.
> At the very minimum we should have links from the JobHistory to the logs on the TT.

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