You are viewing a plain text version of this content. The canonical link for it is here.
Posted to jira@kafka.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/05/06 13:20:00 UTC
[jira] [Commented] (KAFKA-8199) ClassCastException when trying to
groupBy after suppress
[ https://issues.apache.org/jira/browse/KAFKA-8199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16833817#comment-16833817 ]
ASF GitHub Bot commented on KAFKA-8199:
---------------------------------------
ouertani commented on pull request #6646: KAFKA-8199: Fix ClassCastException when trying to groupBy after suppress
URL: https://github.com/apache/kafka/pull/6646
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
users@infra.apache.org
> 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}
>
>
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)