Github user lianhuiwang commented on the pull request:
https://github.com/apache/spark/pull/1589#issuecomment-62489097
yes, the scenario that your said is one of situation.other is:
spark requests 2 containers (yarn request total = 2)
yarn allocates 2 and give it to spark (yarn request total = 0)
spark task failed so +1 to requests (yarn request total = 1)
but in my environment, there are some mistakes in last step.number of
requests is incorrect.
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