Github user attilapiros commented on the issue:
https://github.com/apache/spark/pull/21068
Yes we can create an abstract class from `YarnAllocatorBlacklistTracker`
(like `AbstractAllocatorBlacklistTracker`) where the method
`synchronizeBlacklistedNodes` can have different implementations. In this case
the core and the messages can stay as it is. As I see this is the less risky
and cheaper solution. On the other hand having the complete blacklisting in the
driver has a more centralized/clear design.
We just have to make our mind where to go from here. Any help and
suggestions are welcomed for the decision.
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