mridulm commented on a change in pull request #34632:
URL: https://github.com/apache/spark/pull/34632#discussion_r752476094
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File path: core/src/main/scala/org/apache/spark/storage/BlockInfoManager.scala
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@@ -166,6 +189,48 @@ private[storage] class BlockInfoManager extends Logging {
Option(TaskContext.get()).map(_.taskAttemptId()).getOrElse(BlockInfo.NON_TASK_WRITER)
}
+ /**
+ * Helper for lock acquisistion.
+ */
+ private def acquireLock(
+ blockId: BlockId,
+ blocking: Boolean)(
+ f: BlockInfo => Boolean): Option[BlockInfo] = {
+ var done = false
+ var result: Option[BlockInfo] = None
+ while(!done) {
+ val wrapper = blockInfoWrappers.get(blockId)
+ if (wrapper == null) {
+ done = true
+ } else {
+ wrapper.withLock { (info, condition) =>
+ if (f(info)) {
+ result = Some(info)
+ done = true
+ } else if (!blocking) {
+ done = true
+ } else {
+ condition.await()
Review comment:
You are right, `acquireLock` gets used only where we previous had a
`wait`.
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