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https://issues.apache.org/jira/browse/HADOOP-5473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12689363#action_12689363
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Amareshwari Sriramadasu commented on HADOOP-5473:
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test-patch result :
{noformat}
[exec]
[exec] -1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] -1 tests included. The patch doesn't appear to include any new
or modified tests.
[exec] Please justify why no tests are needed for
this patch.
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[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
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[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
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[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.
[exec]
{noformat}
All unit tests passed on my machine.
> Race condition in command-line kill for a task
> ----------------------------------------------
>
> Key: HADOOP-5473
> URL: https://issues.apache.org/jira/browse/HADOOP-5473
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Amareshwari Sriramadasu
> Assignee: Amareshwari Sriramadasu
> Fix For: 0.19.2
>
> Attachments: patch-5473-1.txt
>
>
> The race condition occurs in following sequence of events:
> 1. User issues a command-line kill for a RUNNING map-task. JT stores the task
> in tasksToKill mapping.
> 2. TT reports the task status as SUCCEEDED.
> 3. JT creates a TaskCompletionEvent as SUCCEEDED. Also sends a killTaskAction.
> 4. Reducers fail fetching the map output.
> 5. finally, the task would fail with Fetch failures. After HADOOP-4759, the
> task is left as FAILED_UNCLEAN task, since the task is present in tasksToKill
> mapping.
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