Lost tasktracker not handled properly leading to tips wrongly being kept as
completed, and hence not rescheduled
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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
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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