Github user CodingCat commented on a diff in the pull request: https://github.com/apache/spark/pull/7927#discussion_r36293219 --- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala --- @@ -590,10 +590,21 @@ private[spark] class BlockManager( private def doGetRemote(blockId: BlockId, asBlockResult: Boolean): Option[Any] = { require(blockId != null, "BlockId is null") val locations = Random.shuffle(master.getLocations(blockId)) + var failTimes = 1 for (loc <- locations) { logDebug(s"Getting remote block $blockId from $loc") - val data = blockTransferService.fetchBlockSync( - loc.host, loc.port, loc.executorId, blockId.toString).nioByteBuffer() + val data = try { + blockTransferService.fetchBlockSync( + loc.host, loc.port, loc.executorId, blockId.toString).nioByteBuffer() + } catch { + case e: IOException if failTimes < locations.size => + // return null when IOException throw ,so we can fetch block --- End diff -- `return null when IOException throw, so we can fetch block....`
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