Github user harishreedharan commented on a diff in the pull request:
https://github.com/apache/spark/pull/3721#discussion_r22027214
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogManager.scala
---
@@ -125,7 +125,7 @@ private[streaming] class WriteAheadLogManager(
* between the node calculating the threshTime (say, driver node), and
the local system time
* (say, worker node), the caller has to take account of possible time
skew.
*/
- def cleanupOldLogs(threshTime: Long): Unit = {
+ def cleanupOldLogs(threshTime: Long): Future[Unit] = {
--- End diff --
I don't think we should be exposing this future. That is internal
implementation detail and we'd have to stick with this implementation. At some
point, we might want to delete the files synchronously - at which point
returning this Future might not make sense.
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