weixiuli opened a new pull request #26206: [SPARK-29551][CORE] Fix a bug about fetch failed when an executor is … URL: https://github.com/apache/spark/pull/26206 …lost ### What changes were proposed in this pull request? There will be a regression when the executor lost and then causes 'fetch failed'. ### Why are the changes needed? Add fetchFailedEpoch to solve the above problem. ### Does this PR introduce any user-facing change? No. ### How was this patch tested? Add unittests.
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