Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/17361#discussion_r107307445
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/streaming/FlatMapGroupsWithStateSuite.scala
---
@@ -519,6 +588,52 @@ class FlatMapGroupsWithStateSuite extends
StateStoreMetricsTest with BeforeAndAf
)
}
+ test("flatMapGroupsWithState - streaming with event time timeout") {
+ // Function to maintain the max event time
+ // Returns the max event time in the state, or -1 if the state was
removed by timeout
+ val stateFunc = (
+ key: String,
+ values: Iterator[(String, Long)],
+ state: KeyedState[Long]) => {
+ val timeoutDelay = 5
+ if (key != "a") {
+ Iterator.empty
+ } else {
+ if (state.hasTimedOut) {
+ state.remove()
+ Iterator((key, -1))
+ } else {
+ val valuesSeq = values.toSeq
+ val maxEventTime = math.max(valuesSeq.map(_._2).max,
state.getOption.getOrElse(0L))
+ val timeoutTimestampMs = maxEventTime + timeoutDelay
+ state.update(maxEventTime)
+ state.setTimeoutTimestamp(timeoutTimestampMs * 1000)
+ Iterator((key, maxEventTime.toInt))
+ }
+ }
+ }
+ val inputData = MemoryStream[(String, Int)]
+ val result =
+ inputData.toDS
+ .select($"_1".as("key"), $"_2".cast("timestamp").as("eventTime"))
+ .withWatermark("eventTime", "10 seconds")
+ .as[(String, Long)]
+ .groupByKey[String]((x: (String, Long)) => x._1)
+ .flatMapGroupsWithState[Long, (String, Int)](Update,
EventTimeTimeout)(stateFunc)
--- End diff --
I was debugging and I left them there thinking it help readability of
tests. I can remove them.
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