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From "Sanjay Dahiya (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-801) job tracker should keep a log of task completion and failure
Date Tue, 02 Jan 2007 16:30:27 GMT

    [ http://issues.apache.org/jira/browse/HADOOP-801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12461759
] 

Sanjay Dahiya commented on HADOOP-801:
--------------------------------------

This patch includes fixes for HADOOP-801 and HADOOP-805. up for review. 

> job tracker should keep a log of task completion and failure
> ------------------------------------------------------------
>
>                 Key: HADOOP-801
>                 URL: http://issues.apache.org/jira/browse/HADOOP-801
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.9.1
>            Reporter: Owen O'Malley
>         Assigned To: Sanjay Dahiya
>             Fix For: 0.10.0
>
>         Attachments: Hadoop-801.patch
>
>
> The JobTracker should track a list of task completion events in JobInProgress.
> So JobClientProtocol & InterTrackerProtocol should get a new method:
>   TaskCompletionEvent[] getTaskCompletionEvents(String jobid, int fromEventId) throws
IOException;
> TaskCompletionEvent should have:
>   int getEventId();
>   String getTaskTrackerHttp();
>   String getTaskId();
>   static public enum Status {FAILED, SUCCEEDED};
>   Status getTaskStatus();
> }
> The events will be stored in a List<TaskCompletionEvent> and the eventId is the
position in the list.
> These event logs will allow JobClient to display task output to the user as well as provide
the start of the fix for HADOOP-248.

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