Github user tgravescs commented on the issue:
https://github.com/apache/spark/pull/17854
I took a quick look at the registerExecutor call in
CoarseGrainedExecutorBackend and its not retrying at all. We should change
that to retry. We retry heartbeats and many other things so it makes sense to
retry this. If that has to retry and takes a bit longer its no worse then you
artificially delaying the launch and its better because if they can get
registered it will be faster then you delaying the launch. Between that and
changing the max launcher threads I would think that would be sufficient. If
not you should have problems during other times. thoughts?
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