Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/4363#discussion_r25463799
--- Diff: core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala ---
@@ -17,33 +17,84 @@
package org.apache.spark
-import akka.actor.Actor
+import scala.concurrent.duration._
+import scala.collection.mutable
+
+import akka.actor.{Actor, Cancellable}
+
import org.apache.spark.executor.TaskMetrics
import org.apache.spark.storage.BlockManagerId
-import org.apache.spark.scheduler.TaskScheduler
+import org.apache.spark.scheduler.{SlaveLost, TaskScheduler}
import org.apache.spark.util.ActorLogReceive
/**
* A heartbeat from executors to the driver. This is a shared message used
by several internal
- * components to convey liveness or execution information for in-progress
tasks.
+ * components to convey liveness or execution information for in-progress
tasks. It will also
+ * expire the hosts that have not heartbeated for more than
spark.driver.executorTimeoutMs.
*/
private[spark] case class Heartbeat(
executorId: String,
taskMetrics: Array[(Long, TaskMetrics)], // taskId -> TaskMetrics
blockManagerId: BlockManagerId)
+private[spark] case object ExpireDeadHosts
+
private[spark] case class HeartbeatResponse(reregisterBlockManager:
Boolean)
/**
* Lives in the driver to receive heartbeats from executors..
*/
-private[spark] class HeartbeatReceiver(scheduler: TaskScheduler)
+private[spark] class HeartbeatReceiver(sc: SparkContext, scheduler:
TaskScheduler)
--- End diff --
Yes, but it's bad design pattern to pass in the whole `SparkContext`
everywhere since it has such a wide interface that we don't actually need. I
would argue that it's actually easier to understand because from the signature
alone we know exactly what is needed by `HeartbeatReceiver`.
Anyway, not a big deal since this is private. I will merge it as is.
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