maheshk114 commented on code in PR #45228:
URL: https://github.com/apache/spark/pull/45228#discussion_r1542849547
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core/src/main/scala/org/apache/spark/storage/FallbackStorage.scala:
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@@ -110,14 +158,35 @@ private[spark] object FallbackStorage extends Logging {
/** We use one block manager id as a place holder. */
val FALLBACK_BLOCK_MANAGER_ID: BlockManagerId = BlockManagerId("fallback",
"remote", 7337)
- def getFallbackStorage(conf: SparkConf): Option[FallbackStorage] = {
- if (conf.get(STORAGE_DECOMMISSION_FALLBACK_STORAGE_PATH).isDefined) {
- Some(new FallbackStorage(conf))
+ // There should be only one fallback storage thread pool per executor.
+ var fallbackStorage: Option[FallbackStorage] = None
+ def getFallbackStorage(conf: SparkConf): Option[FallbackStorage] =
this.synchronized {
+ if (conf != null &&
conf.get(STORAGE_DECOMMISSION_FALLBACK_STORAGE_PATH).isDefined) {
Review Comment:
Some unit tests scenario, the conf is not initialized.
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