cloud-fan commented on issue #25971: [SPARK-29298][CORE] Separate block manager heartbeat endpoint from driver endpoint URL: https://github.com/apache/spark/pull/25971#issuecomment-550980008 I'd like to confirm what's been fixed by this PR. If `BlockManagerMaster` is too busy and timeout the heartbeat, then creating a new end-point for heartbeat can make `BlockManagerMaster` less busy, but by how much? If `BlockManagerMaster` is mostly busy with other events and heartbeat is a very small portion, then I'm not sure how useful is the new end-point.
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