Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18083#discussion_r118412901
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/LiveListenerBus.scala ---
@@ -33,25 +37,24 @@ import org.apache.spark.util.Utils
* has started will events be actually propagated to all attached
listeners. This listener bus
* is stopped when `stop()` is called, and it will drop further events
after stopping.
*/
-private[spark] class LiveListenerBus(val sparkContext: SparkContext)
extends SparkListenerBus {
+private[spark] class LiveListenerBus(conf: SparkConf) extends
SparkListenerBus {
self =>
import LiveListenerBus._
+ private var sparkContext: SparkContext = _
+
// Cap the capacity of the event queue so we get an explicit error
(rather than
// an OOM exception) if it's perpetually being added to more quickly
than it's being drained.
- private lazy val EVENT_QUEUE_CAPACITY = validateAndGetQueueSize()
- private lazy val eventQueue = new
LinkedBlockingQueue[SparkListenerEvent](EVENT_QUEUE_CAPACITY)
-
- private def validateAndGetQueueSize(): Int = {
- val queueSize = sparkContext.conf.get(LISTENER_BUS_EVENT_QUEUE_SIZE)
- if (queueSize <= 0) {
- throw new
SparkException("spark.scheduler.listenerbus.eventqueue.size must be > 0!")
- }
- queueSize
+ private val eventQueue = {
+ val capacity = conf.get(LISTENER_BUS_EVENT_QUEUE_SIZE)
+ require(capacity > 0, s"${LISTENER_BUS_EVENT_QUEUE_SIZE.key} must be >
0!")
--- End diff --
this constraint can be put in `LISTENER_BUS_EVENT_QUEUE_SIZE` with
`TypedConfigBuilder.checkValue`
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