Github user tdas commented on a diff in the pull request: https://github.com/apache/spark/pull/18799#discussion_r131804073 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/CompactibleFileStreamLog.scala --- @@ -186,7 +190,11 @@ abstract class CompactibleFileStreamLog[T <: AnyRef : ClassTag]( if (latestId >= 0) { try { val logs = - getAllValidBatches(latestId, compactInterval).flatMap(id => super.get(id)).flatten + getAllValidBatches(latestId, compactInterval).map { id => + super.get(id).getOrElse { + throw new IllegalStateException(s"batch $id doesn't exist") --- End diff -- would be good give more context information. like latestId, etc.
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