Github user sameeragarwal commented on a diff in the pull request:
https://github.com/apache/spark/pull/14412#discussion_r101430017
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala
---
@@ -1131,14 +1131,47 @@ private[spark] class BlockManager(
}
/**
+ * Called for pro-active replenishment of blocks lost due to executor
failures
+ *
+ * @param blockId blockId being replicate
+ * @param replicas existing block managers that have a replica
+ * @param maxReps maximum replicas needed
+ * @return
+ */
+ def replicateBlock(blockId: BlockId, replicas: Set[BlockManagerId],
maxReps: Int): Boolean = {
+ logInfo(s"Pro-actively replicating $blockId")
+ val infoForReplication = blockInfoManager.lockForReading(blockId).map
{ info =>
+ val data = doGetLocalBytes(blockId, info)
+ val storageLevel = StorageLevel(
+ info.level.useDisk,
+ info.level.useMemory,
+ info.level.useOffHeap,
+ info.level.deserialized,
+ maxReps)
+ (data, storageLevel, info.classTag)
+ }
+ infoForReplication.foreach { case (data, storageLevel, classTag) =>
+ replicate(blockId, data, storageLevel, classTag, replicas)
+ }
+ true
+ }
+
+ /**
* Replicate block to another node. Note that this is a blocking call
that returns after
* the block has been replicated.
+ *
+ * @param blockId
+ * @param data
+ * @param level
+ * @param classTag
+ * @param existingReplicas
*/
private def replicate(
- blockId: BlockId,
- data: ChunkedByteBuffer,
- level: StorageLevel,
- classTag: ClassTag[_]): Unit = {
--- End diff --
nit: this still needs fixing
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