wangshuo128 commented 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-454651911 @Ngone51 #23521 removes `registerChannel` and associates stream with channel in `registerStream` when handle `OpenBlocks` request.
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