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https://issues.apache.org/jira/browse/KAFKA-8199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jose Lopez reassigned KAFKA-8199:
---------------------------------
Assignee: Jose Lopez
> 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
> Assignee: Jose Lopez
> Priority: Major
> 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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