Github user sameeragarwal commented on a diff in the pull request:
https://github.com/apache/spark/pull/14412#discussion_r98604381
--- Diff:
core/src/main/scala/org/apache/spark/storage/BlockManagerMasterEndpoint.scala
---
@@ -188,24 +189,45 @@ class BlockManagerMasterEndpoint(
}
private def removeBlockManager(blockManagerId: BlockManagerId) {
+ val proactivelyReplicate =
conf.get("spark.storage.replication.proactive", "false").toBoolean
+
val info = blockManagerInfo(blockManagerId)
// Remove the block manager from blockManagerIdByExecutor.
blockManagerIdByExecutor -= blockManagerId.executorId
- // Remove it from blockManagerInfo and remove all the blocks.
- blockManagerInfo.remove(blockManagerId)
val iterator = info.blocks.keySet.iterator
while (iterator.hasNext) {
val blockId = iterator.next
val locations = blockLocations.get(blockId)
locations -= blockManagerId
if (locations.size == 0) {
blockLocations.remove(blockId)
+ logWarning(s"No more replicas available for $blockId !")
+ } else if ((blockId.isRDD || blockId.isInstanceOf[TestBlockId]) &&
proactivelyReplicate) {
+ // we only need to proactively replicate RDD blocks
--- End diff --
I think it makes sense overall but it'd be great to add some more comments
about why are we only concerned with RDD blocks and not others.
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