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https://issues.apache.org/jira/browse/HADOOP-801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12465237
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Hadoop QA commented on HADOOP-801:
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+1, because
http://issues.apache.org/jira/secure/attachment/12349007/Hadoop-801.patch
applied and successfully tested against trunk revision r495045.
> job tracker should keep a log of task completion and failure
> ------------------------------------------------------------
>
> Key: HADOOP-801
> URL: https://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: 0.11.0
>
> Attachments: Hadoop-801.patch, Hadoop-801.patch, Hadoop-801.patch,
> 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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