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[SPARK-10102][Streaming]Fix a race condition that startReceiver may happen before setting trackerState to Started #8294

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zsxwing wants to merge 2 commits into from
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[SPARK-10102][Streaming]Fix a race condition that startReceiver may happen before setting trackerState to Started #8294

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c1a6126
Fix a race condition that startReceiver may happen before setting tra…
zsxwing Aug 19, 2015
36e7836
Add shouldStartReceiver
zsxwing Aug 19, 2015
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Add shouldStartReceiver
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@zsxwing
zsxwing committed Aug 19, 2015
commit 36e783695a783d65f1b08b2de36f37cf42c9d128
11 changes: 8 additions & 3 deletions streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -468,8 +468,13 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
* Start a receiver along with its scheduled executors
*/
private def startReceiver(receiver: Receiver[_], scheduledExecutors: Seq[String]): Unit = {
def shouldStartReceiver: Boolean = {
// It's okay to start when trackerState is Initialized or Started
!(isTrackerStopping || isTrackerStopped)
}

val receiverId = receiver.streamId
if (isTrackerStopping || isTrackerStopped) {
if (!shouldStartReceiver) {
onReceiverJobFinish(receiverId)
return
}
Expand All @@ -494,14 +499,14 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
// We will keep restarting the receiver job until ReceiverTracker is stopped
future.onComplete {
case Success(_) =>
if (isTrackerStopping || isTrackerStopped) {
if (!shouldStartReceiver) {
onReceiverJobFinish(receiverId)
} else {
logInfo(s"Restarting Receiver $receiverId")
self.send(RestartReceiver(receiver))
}
case Failure(e) =>
if (isTrackerStopping || isTrackerStopped) {
if (!shouldStartReceiver) {
onReceiverJobFinish(receiverId)
} else {
logError("Receiver has been stopped. Try to restart it.", e)
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