Github user shivaram commented on a diff in the pull request:
https://github.com/apache/spark/pull/2851#discussion_r19096569
--- Diff: core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala ---
@@ -30,7 +30,8 @@ import org.apache.spark.util.ActorLogReceive
private[spark] case class Heartbeat(
executorId: String,
taskMetrics: Array[(Long, TaskMetrics)], // taskId -> TaskMetrics
- blockManagerId: BlockManagerId)
+ blockManagerId: BlockManagerId,
+ broadcastBlocks: Map[BlockId, Option[BlockStatus]])
--- End diff --
Would this send a BlockStatus for each broadcast variable on a heartbeat ?
If we have hundreds or thousands of broadcast variables I wonder if the message
size will become huge. Could we send deltas somehow ?
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