A successful tip can fail unnecessarily
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Key: HADOOP-3972
URL: https://issues.apache.org/jira/browse/HADOOP-3972
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Reporter: Amar Kamat
Consider the following sequence of events
1. tip _t_ has 5 attempts, _attempt_0-4_. Lets assume that
_attempt_0,attempt_1_ and _attempt_2_ have failed. _attempt_3_ and _attempt_4_
are running.
2. _attempt_3_ runs on tracker _t1_ and attempt_4 runs on tracker _t2_
3. _attempt_3_ reports success and the tip _t_ is marked successful
4. _attempt_4_ reports failure and the tip _t_ is failed based on the call to
_TaskInProgress.incompleteSubTask()_.
Here the tip _t_ is failed unnecessarily.
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