Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/3582#discussion_r21352490
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockInfo.scala ---
@@ -26,6 +29,17 @@ private[storage] class BlockInfo(val level:
StorageLevel, val tellMaster: Boolea
private def failed: Boolean = size == BlockInfo.BLOCK_FAILED
private def initThread: Thread = BlockInfo.blockInfoInitThreads.get(this)
+ val lock = new ReentrantLock()
+ private val waitNCondition = lock.newCondition()
+ private val wait1Condition = lock.newCondition()
+
+ val waitTypes = new WaitType(new mutable.HashMap +=
--- End diff --
I think you can just do `Map("PUT" -> waitNCondition, "DROP" ->
wait1Condition, "GET" -> wait1Condition)` instead of using a mutable map.
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