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From "Ravi Gummadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5276) Upon a lost tracker, the task's start time is reset to 0
Date Fri, 20 Feb 2009 09:37:01 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12675295#action_12675295
] 

Ravi Gummadi commented on HADOOP-5276:
--------------------------------------

I tested this patch with HADOOP-4191 and I see that correct values of start time and finish
time are logged to history file with this patch.

+1

> Upon a lost tracker, the task's start time is reset to 0
> --------------------------------------------------------
>
>                 Key: HADOOP-5276
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5276
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Amar Kamat
>            Priority: Critical
>         Attachments: HADOOP-5276-v1.1.patch, HADOOP-5276-v1.2.patch
>
>
> Upon lost tracker, the JIP (via JobTracker.lostTracker() -> JobInProgress.failedTask())
hand crafts task status (marking the attempt as KILLED) and updates the JobInProgress (via
JobInProgress.updateTaskStatus()). This status contains the attempt start time as 0. One major
impact would be that the listener will overwrite the last start time value with the new one
and hence the start tiem will get garbled.

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