Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/1103#discussion_r13903517
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala
---
@@ -363,6 +363,12 @@ private[spark] class BlockManager(
val info = blockInfo.get(blockId).orNull
if (info != null) {
info.synchronized {
+ // Double check to make sure the block is still there, since it
+ // might has been removed when we actually come here.
--- End diff --
has -> have
also can you point out in the comment that this only works because
"removeBlock" also synchronizes on the block info object?
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