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Posted to dev@kafka.apache.org by "Wardha Perinkada Kattu (Jira)" <ji...@apache.org> on 2020/08/18 15:06:00 UTC
[jira] [Created] (KAFKA-10417) suppress() with cogroup() throws
ClassCastException
Wardha Perinkada Kattu created KAFKA-10417:
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Summary: suppress() with cogroup() throws ClassCastException
Key: KAFKA-10417
URL: https://issues.apache.org/jira/browse/KAFKA-10417
Project: Kafka
Issue Type: Bug
Components: streams
Affects Versions: 2.6.0
Reporter: Wardha Perinkada Kattu
Streams operation - `cogroup()`, `aggregate()` followed by `suppress()` throws `ClassCastException`
Works fine without the `suppress()`
{code:java}
val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
.groupByKey(Grouped.with(Serdes.String(), serdesConfig.notificationSerde()))
val streams2 = confirmationStreams
.groupByKey(Grouped.with(Serdes.String(), serdesConfig.confirmationsSerde()))
val cogrouped = stream1.cogroup(notificationAggregator).cogroup(streams2, confirmationsAggregator)
.windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong())))
.aggregate({ null }, Materialized.`as`<String, NotificationMetric, WindowStore<Bytes, ByteArray>>("time-windowed-aggregated-stream-store")
.withValueSerde(serdesConfig.notificationMetricSerde()))
.suppress(Suppressed.untilWindowCloses(unbounded()))
.toStream()
{code}
Exception thrown is:
{code:java}
Caused by: java.lang.ClassCastException: class org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier (org.apache.kafka.streams.kstream.internals.PassThrough and org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in unnamed module of loader 'app')
{code}
[https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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