Github user markhamstra commented on the pull request:
https://github.com/apache/spark/pull/3550#issuecomment-65194915
The application won't be killed if an executor has been recognized by
master as RUNNING
(https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/deploy/master/Master.scala#L328).
The buggy host will just keep trying and failing to launch executors.
Detecting and blacklisting buggy hosts seems like a separable and complex
issue. It would also be a new feature that maybe we don't want to add to 1.2
at the last minute.
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