Github user mridulm commented on the pull request:
https://github.com/apache/spark/pull/159#issuecomment-37789635
We only blacklist an executor for a specific task for a short period of
time (EXECUTOR_TASK_BLACKLIST_TIMEOUT, not indefinitely). The reason for doing
this immediately is to prevent abort of the taskset when it hits
maxTaskFailures : the main motivation why we added this was job failures due to
this.
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