Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/6294#discussion_r34859014
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
---
@@ -71,13 +72,32 @@ class ReceiverTracker(ssc: StreamingContext,
skipReceiverLaunch: Boolean = false
)
private val listenerBus = ssc.scheduler.listenerBus
+ /** Enumeration to identify current state of the ReceiverTracker */
+ object TrackerState extends Enumeration {
+ type CheckpointState = Value
+ val Initialized, Started, Stopping, Stopped = Value
+ }
+ import TrackerState._
+
+ /** State of the tracker. Protected by "trackerStateLock" */
+ @volatile private var trackerState = Initialized
+
// endpoint is created when generator starts.
// This not being null means the tracker has been started and not stopped
private var endpoint: RpcEndpointRef = null
+ /** Check if tracker has been marked for starting */
--- End diff --
nit: I had said some where earlier. These utility methods are better put
towards the end of the class.
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