turboFei edited a comment on issue #24533: [SPARK-27637][Shuffle] For nettyBlockTransferService, if IOException occurred while fetching data, check whether relative executor is alive before retry URL: https://github.com/apache/spark/pull/24533#issuecomment-492044193 @cloud-fan I also add relative unit test to test retryingBlockFetcher, which asserts that retryingBlockFetcher does not retry because the relative executor has been dead.
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