[GitHub] [spark] 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

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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-492038984
 
 
   I have added a unit test, I create a driverEndpointRef which always return false when ask any message.
   And let mock client throw IOException when sendRpc, then the nettyBlockTransferService will get if relative executors is alive, which must be false.
   At last, I let the blockFetchListener throw ExecutorDeadException when it fetch failed for ExecutorDeadException. @cloud-fan 

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