Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/9143#discussion_r44310128
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
---
@@ -488,7 +493,24 @@ class ReceiverTracker(ssc: StreamingContext,
skipReceiverLaunch: Boolean = false
registerReceiver(streamId, typ, host, executorId,
receiverEndpoint, context.senderAddress)
context.reply(successful)
case AddBlock(receivedBlockInfo) =>
- context.reply(addBlock(receivedBlockInfo))
+ if (WriteAheadLogUtils.isBatchingEnabled(ssc.conf, isDriver =
true)) {
+ val f = Future {
+ if (active) {
+ addBlock(receivedBlockInfo)
+ } else {
+ throw new IllegalStateException("Receiver Tracker Endpoint
shut down.")
+ }
+ }(walBatchingThreadPool)
+ f.onComplete { result =>
+ if (active) {
+ context.reply(result.get)
--- End diff --
It's better to log the error. Otherwise, it will just output the std err.
See
https://github.com/scala/scala/blob/a6e77f721921d9e2569433761a1e6a4056ae10f8/src/library/scala/concurrent/ExecutionContext.scala#L177
Actually, I suggest rewriting these codes like:
```Scala
walBatchingThreadPool.execute(new Runnable {
override def run(): Unit = Utils.tryLogNonFatalError{
if (active) {
context.reply(addBlock(receivedBlockInfo))
} else {
throw new IllegalStateException("Receiver Tracker Endpoint
shut down.")
}
}
})
```
This is much simpler
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