Wangda Tan created MAPREDUCE-6574:
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Summary: MR AM should print host of failed tasks.
Key: MAPREDUCE-6574
URL: https://issues.apache.org/jira/browse/MAPREDUCE-6574
Project: Hadoop Map/Reduce
Issue Type: Bug
Reporter: Wangda Tan
Something tasks failed because of issues on NMs. For example, bad disk/network
could cause reducer fetching failure and mappers need to be re-scheduled.
It will be very helpful to identify such issues if we could print host of
failed tasks, which we can simply grep MR AM's log to see what happened.
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