Github user JoshRosen commented on a diff in the pull request:

    https://github.com/apache/spark/pull/11534#discussion_r55612253
  
    --- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala 
---
    @@ -428,77 +458,46 @@ private[spark] class BlockManager(
           Option(
             
shuffleBlockResolver.getBlockData(blockId.asInstanceOf[ShuffleBlockId]).nioByteBuffer())
         } else {
    -      doGetLocal(blockId, asBlockResult = 
false).asInstanceOf[Option[ByteBuffer]]
    -    }
    -  }
    -
    -  private def doGetLocal(blockId: BlockId, asBlockResult: Boolean): 
Option[Any] = {
    -    blockInfoManager.lockForReading(blockId) match {
    -      case None =>
    -        logDebug(s"Block $blockId was not found")
    -        None
    -      case Some(info) =>
    -        doGetLocal(blockId, info, asBlockResult)
    +      blockInfoManager.lockForReading(blockId) match {
    +        case None =>
    +          logDebug(s"Block $blockId was not found")
    +          None
    +        case Some(info) =>
    +          Some(doGetLocalBytes(blockId, info))
    +      }
    --- End diff --
    
    I considered this but thought that doing so would be more confusing to 
readers.


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