Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/10934#discussion_r50933818
--- Diff:
streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala ---
@@ -821,6 +821,33 @@ class CheckpointSuite extends TestSuiteBase with
DStreamCheckpointTester
checkpointWriter.stop()
}
+ test("SPARK-6847: stack overflow when updateStateByKey is followed by a
checkpointed dstream") {
+ ssc = new StreamingContext(master, framework, batchDuration)
+ val batchCounter = new BatchCounter(ssc)
+ ssc.checkpoint(checkpointDir)
+ val inputDStream = new CheckpointInputDStream(ssc)
+ val updateFunc = (values: Seq[Int], state: Option[Int]) => {
+ Some(values.sum + state.getOrElse(0))
+ }
+ @volatile var recursiveCheckpoint = false
+ @volatile var rddsBothCheckpointed = false
+ inputDStream.map(i => (i, i)).
+ updateStateByKey[Int](updateFunc).checkpoint(batchDuration).
+ map(i => i).checkpoint(batchDuration).
--- End diff --
would you test this using two updateStateByKey
also this code style is weird and hard to read.
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