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From "Iyappan Srinivasan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-467) Collect information about number of tasks succeeded / total per time unit for a tasktracker.
Date Fri, 10 Jul 2009 10:39:15 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12729596#action_12729596

Iyappan Srinivasan commented on MAPREDUCE-467:

Tested some important scenarios and found them to pass:

1)  After restarting a blacklisted tasktracker, it shd be made healthy and continue to receive
task numbers. - In 5 node cluster. :Pass

2) After task tracker is killed and goes out of node list, otehr nodes recive these tasks
and execute them. Number of tasks match.

3) Some task attempts are killed. The numbers captured reflects teh failures properly.

4) Do a job restart. task trackers should start receiveing tasks again and reflect it in their

5) For blacklisting scenarios, first  MAPREDUCE-746 needs to be fixed.

> Collect information about number of tasks succeeded / total per time unit for a tasktracker.

> ---------------------------------------------------------------------------------------------
>                 Key: MAPREDUCE-467
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-467
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Hemanth Yamijala
>            Assignee: Sharad Agarwal
>         Attachments: 467_v4.patch, 467_v5.patch, 467_v6.patch, 467_v7.patch, 5931_v1.patch,
5931_v2.patch, 5931_v3.patch
> Collecting information of number of tasks succeeded / total per tasktracker and being
able to see these counts per hour, day and since start time will help reason about things
like the blacklisting strategy.

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