Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/21560#discussion_r198050994
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/continuous/ContinuousDataSourceRDD.scala
---
@@ -98,6 +98,10 @@ class ContinuousDataSourceRDD(
override def getPreferredLocations(split: Partition): Seq[String] = {
split.asInstanceOf[ContinuousDataSourceRDDPartition].inputPartition.preferredLocations()
}
+
+ override def clearDependencies(): Unit = {
+ throw new IllegalStateException("Continuous RDDs cannot be
checkpointed")
--- End diff --
@HeartSaVioR No this method no intended for being called in normal
circumstance. And less of a reason to call this in an internally generated RDD.
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