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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5276) Upon a lost tracker, the task's start time is reset to 0
Date Mon, 23 Feb 2009 12:13:01 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5276?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Amar Kamat updated HADOOP-5276:
-------------------------------

    Attachment: HADOOP-5276-v1.3.patch

Updates the patch to trunk. Test patch result :
{code}
[exec] +1 overall.  
     [exec] 
     [exec]     +1 @author.  The patch does not contain any @author tags.
     [exec] 
     [exec]     +1 tests included.  The patch appears to include 3 new or modified tests.
     [exec] 
     [exec]     +1 javadoc.  The javadoc tool did not generate any warning messages.
     [exec] 
     [exec]     +1 javac.  The applied patch does not increase the total number of javac compiler
warnings.
     [exec] 
     [exec]     +1 findbugs.  The patch does not introduce any new Findbugs warnings.
     [exec] 
     [exec]     +1 Eclipse classpath. The patch retains Eclipse classpath integrity.
     [exec] 
     [exec]     +1 release audit.  The applied patch does not increase the total number of
release audit warnings.
{code}

> 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, HADOOP-5276-v1.3.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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