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https://issues.apache.org/jira/browse/SPARK-34534?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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haiyangyu updated SPARK-34534:
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Attachment: image-2021-02-25-11-28-31-255.png
> New protocol FetchShuffleBlocks in OneForOneBlockFetcher lead to data loss or
> correctness
> -----------------------------------------------------------------------------------------
>
> Key: SPARK-34534
> URL: https://issues.apache.org/jira/browse/SPARK-34534
> Project: Spark
> Issue Type: Bug
> Components: Shuffle
> Affects Versions: 3.0.0, 3.0.1, 3.0.2
> Reporter: haiyangyu
> Priority: Major
> Labels: Correctness, data-loss
> Attachments: image-2021-02-25-11-17-12-714.png,
> image-2021-02-25-11-27-34-429.png, image-2021-02-25-11-28-31-255.png
>
>
> We will build a new rpc message `FetchShuffleBlocks` when
> `OneForOneBlockFetcher` init in replace of
> `OpenBlocks` to use adaptive feature, this introduce additional problems as
> follows.
> `OneForOneBlockFetcher` will init a `blockIds` String array to catch chunk
> fetch success, it will use index in `blockIds` to fetch blocks and match
> blockId in `blockIds` when chunk data return. So the `blockIds` 's order must
> be consistent with fetchChunk index.
> !image-2021-02-25-11-17-12-714.png|width=875,height=502!
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