[jira] [Created] (KAFKA-8199) ClassCastException when trying to groupBy after suppress

["Bill Bejeck (JIRA)" <ji...@apache.org>]

Bill Bejeck created KAFKA-8199:
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             Summary: ClassCastException when trying to groupBy after suppress
                 Key: KAFKA-8199
                 URL: https://issues.apache.org/jira/browse/KAFKA-8199
             Project: Kafka
          Issue Type: Bug
          Components: streams
    Affects Versions: 2.1.0
            Reporter: Bill Bejeck
             Fix For: 2.3.0


A topology with a groupBy after a suppress operation results in a ClassCastException

 The following sample topology
{noformat}
Properties properties = new Properties(); properties.put(StreamsConfig.APPLICATION_ID_CONFIG, "appid"); properties.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG,"localhost"); StreamsBuilder builder = new StreamsBuilder(); builder.<String, String>stream("topic").groupByKey().windowedBy(TimeWindows.of(Duration.ofSeconds(30))).count() .suppress(Suppressed.untilTimeLimit(Duration.ofHours(1), BufferConfig.unbounded())) .groupBy((k, v) -> KeyValue.pair(k,v)).count().toStream(); builder.build(properties);
{noformat}
results in this exception:
{noformat}
java.lang.ClassCastException: org.apache.kafka.streams.kstream.internals.KTableImpl$$Lambda$4/2084435065 cannot be cast to org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier{noformat}
 

 



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