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https://issues.apache.org/jira/browse/HADOOP-2031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12534142
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Arun C Murthy commented on HADOOP-2031:
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+1
> Lost tasktracker not handled properly leading to tips wrongly being kept as
> completed, and hence not rescheduled
> ----------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-2031
> URL: https://issues.apache.org/jira/browse/HADOOP-2031
> Project: Hadoop
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.15.0
> Reporter: Devaraj Das
> Assignee: Devaraj Das
> Priority: Blocker
> Fix For: 0.15.0
>
> Attachments: 2031.patch
>
>
> The TIP.isComplete(taskid) checks for TaskStatus.state being SUCCEEDED and
> this is used to determine whether this taskid took the TIP to completion.
> Since, the taskstatus for a KILLED task would have the state as KILLED, this
> check would fail and hence the TIP would never be marked incomplete. The
> right solution is to maintain the successful taskid and use that in
> TIP.isComplete(taskid). This bug got introduced in the last patch for
> HADOOP-1874.
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