Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/19396
Sorry for the late response. I understand you purpose now. I think such
behavior discrepancy is not a big problem.
I guess the reason why NM still run with exception is that NM doesn't serve
only for Spark, but also MR/TEZ, so the failure of Spark external service
should not affect MR's.
Based on your comment above, I don't have a strong preference on either, I
think both are OK. Maybe you can ping others to get their feedbacks.
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