Github user JoshRosen commented on a diff in the pull request: https://github.com/apache/spark/pull/11534#discussion_r55610963 --- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala --- @@ -407,11 +399,49 @@ private[spark] class BlockManager( } /** - * Get block from local block manager. + * Get block from local block manager as an iterator of Java objects. */ - def getLocal(blockId: BlockId): Option[BlockResult] = { + def getLocalValues(blockId: BlockId): Option[BlockResult] = { logDebug(s"Getting local block $blockId") - doGetLocal(blockId, asBlockResult = true).asInstanceOf[Option[BlockResult]] + blockInfoManager.lockForReading(blockId) match { + case None => + logDebug(s"Block $blockId was not found") + None + case Some(info) => + val level = info.level + logDebug(s"Level for block $blockId is $level") + if (level.useMemory && memoryStore.contains(blockId)) { + val iter: Iterator[Any] = if (level.deserialized) { + memoryStore.getValues(blockId).get + } else { + dataDeserialize(blockId, memoryStore.getBytes(blockId).get) + } + val ci = CompletionIterator[Any, Iterator[Any]](iter, releaseLock(blockId)) + Some(new BlockResult(ci, DataReadMethod.Memory, info.size)) + } else if (level.useDisk && diskStore.contains(blockId)) { + val valuesFromDisk = dataDeserialize(blockId, diskStore.getBytes(blockId)) + val iterToReturn: Iterator[Any] = { + if (level.deserialized) { + // Cache the values before returning them + memoryStore.putIterator(blockId, valuesFromDisk, level) match { + case Left(iter) => + // The memory store put() failed, so it returned the iterator back to us: + iter + case Right(_) => + // The put() succeeded, so we can read the values back: + memoryStore.getValues(blockId).get + } + } else { + valuesFromDisk + } + } + val ci = CompletionIterator[Any, Iterator[Any]](iterToReturn, releaseLock(blockId)) + Some(new BlockResult(ci, DataReadMethod.Disk, info.size)) + } else { + releaseLock(blockId) --- End diff -- Nope; we want the caller to hold a read lock if this method returns successfully.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org