Ngone51 edited a comment on issue #23355: [SPARK-26418][SHUFFLE] Only OpenBlocks without any ChunkFetch for one stream will cause memory leak in ExternalShuffleService URL: https://github.com/apache/spark/pull/23355#issuecomment-454373004 ~@cloud-fan It's not same. #23521 register a channel when server receive `FetchChunkRequest` or `SreamRequest` after it receiving `OpenBlocks`, which follows past way. And this pr suggests to register a channel once server receive `OpenBlocks`.~ ~And I think there's conflict now since #23521 try to make `registerChannel` a `private` method.~
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