jiangxb1987 opened a new pull request #27972: [SPARK-31207][CORE] Ensure the total number of blocks to fetch equals to the sum of local/hostLocal/remote blocks URL: https://github.com/apache/spark/pull/27972 ### What changes were proposed in this pull request? Assert the number of blocks to fetch equals the number of local blocks + the number of hostLocal blocks + the number of remote blocks in ShuffleBlockFetcherIterator. Also refactor the code a bit to make it easier to follow. ### Why are the changes needed? When the numbers don't match it means something is going wrong, we should fail fast. ### Does this PR introduce any user-facing change? No. This is basically code refactoring. ### How was this patch tested? Tested with existing test suites.
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