[GitHub] [spark] xuanyuanking opened a new pull request #24565: [SPARK-27665][Core] Split fetch shuffle blocks protocol from OpenBlocks

[GitBox <gi...@apache.org>]

xuanyuanking opened a new pull request #24565: [SPARK-27665][Core] Split fetch shuffle blocks protocol from OpenBlocks
URL: https://github.com/apache/spark/pull/24565
 
 
   ## What changes were proposed in this pull request?
   
   As the current approach in OneForOneBlockFetcher, we reuse the OpenBlocks protocol to describe the fetch request for shuffle blocks, and it causes the extension work for shuffle fetching like #19788 and #24110 very awkward.
   In this PR, we split the fetch request for shuffle blocks from OpenBlocks which named FetchShuffleBlocks. It's a loose bind with ShuffleBlockId and can easily extend by adding new fields in this protocol.
   
   ## How was this patch tested?
   
   Existing and new added UT.

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