tkaymak commented on code in PR #39939:
URL: https://github.com/apache/beam/pull/39939#discussion_r3903645635
##########
runners/spark/src/main/java/org/apache/beam/runners/spark/structuredstreaming/translation/SparkSessionFactory.java:
##########
@@ -288,11 +289,63 @@ public void registerClasses(Kryo kryo) {
kryo.register(CoGbkResultSchema.class);
kryo.register(TupleTag.class);
kryo.register(TupleTagList.class);
+
+ // Spark internals only present when running streaming pipelines on
Spark 4. These are
+ // registered by name because the shared runner base also compiles
against Spark 3, where
Review Comment:
Done in 4815a681e77, comments trimmed and the wording now says the shared
sources are compiled once per Spark version into separate artifacts. The follow
up from #39906 is addressed in a separate small PR, linked there.
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