Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/17216#discussion_r106059371
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamSuite.scala ---
@@ -389,6 +392,102 @@ class StreamSuite extends StreamTest {
query.stop()
assert(query.exception.isEmpty)
}
+
+ test("SPARK-19873: streaming aggregation with change in number of
partitions") {
+ val inputData = MemoryStream[(Int, Int)]
+ val agg = inputData.toDS().groupBy("_1").count()
+
+ testStream(agg, OutputMode.Complete())(
+ AddData(inputData, (1, 0), (2, 0)),
+ StartStream(additionalConfs = Map(SQLConf.SHUFFLE_PARTITIONS.key ->
"2")),
+ CheckAnswer((1, 1), (2, 1)),
+ StopStream,
+ AddData(inputData, (3, 0), (2, 0)),
+ StartStream(additionalConfs = Map(SQLConf.SHUFFLE_PARTITIONS.key ->
"5")),
+ CheckAnswer((1, 1), (2, 2), (3, 1)),
+ StopStream,
+ AddData(inputData, (3, 0), (1, 0)),
+ StartStream(additionalConfs = Map(SQLConf.SHUFFLE_PARTITIONS.key ->
"1")),
+ CheckAnswer((1, 2), (2, 2), (3, 2)))
+ }
+
+ test("SPARK-19873: backward compatibility - recover from a Spark v2.1
checkpoint") {
--- End diff --
This is not directly tied to SPARK-19873. remove SPARK-19873. just "recover
from a Spark v2.1 checkpoint"
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