Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/2929#discussion_r19382312
--- Diff:
core/src/main/scala/org/apache/spark/network/nio/NioBlockTransferService.scala
---
@@ -95,16 +95,21 @@ final class NioBlockTransferService(conf: SparkConf,
securityManager: SecurityMa
future.onSuccess { case message =>
val bufferMessage = message.asInstanceOf[BufferMessage]
val blockMessageArray =
BlockMessageArray.fromBufferMessage(bufferMessage)
-
- for (blockMessage <- blockMessageArray) {
- if (blockMessage.getType != BlockMessage.TYPE_GOT_BLOCK) {
- listener.onBlockFetchFailure(
- new SparkException(s"Unexpected message
${blockMessage.getType} received from $cmId"))
- } else {
- val blockId = blockMessage.getId
- val networkSize = blockMessage.getData.limit()
- listener.onBlockFetchSuccess(
- blockId.toString, new
NioByteBufferManagedBuffer(blockMessage.getData))
+ // SPARK-4064: In some cases(eg. Remote block was removed)
blockMessageArray may be empty.
+ if (blockMessageArray.isEmpty) {
+ listener.onBlockFetchFailure(
+ new SparkException(s"Not received data from $cmId"))
--- End diff --
Can this say "Received empty message from $cmId" or "Received no data from
$cmId"?
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