Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/14232#discussion_r71064096
--- Diff:
common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/protocol/BlockTransferMessage.java
---
@@ -35,6 +35,9 @@
* shuffle service. It returns a StreamHandle.
* - UploadBlock is only handled by the NettyBlockTransferService.
* - RegisterExecutor is only handled by the external shuffle service.
+ * - StreamHandle is only handled by the OneForOneBlockFetcher.
+ * - RegisterDriver is only handled by the MesosExternalShuffleService.
+ * - HearBeat is only handled by the MesosExternalShuffleService.
--- End diff --
Best to ask the author where possible; use Blame to see who wrote these
parts. @aarondav ?
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