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Posted to jira@kafka.apache.org by "Pedro Gontijo (Jira)" <ji...@apache.org> on 2020/09/17 17:30:00 UTC
[jira] [Updated] (KAFKA-10493) Ktable out-of-order updates are not
being ignored
[ https://issues.apache.org/jira/browse/KAFKA-10493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Pedro Gontijo updated KAFKA-10493:
----------------------------------
Affects Version/s: (was: 2.3.0)
> Ktable out-of-order updates are not being ignored
> -------------------------------------------------
>
> Key: KAFKA-10493
> URL: https://issues.apache.org/jira/browse/KAFKA-10493
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 2.6.0
> Reporter: Pedro Gontijo
> Priority: Major
> Attachments: KTableOutOfOrderBug.java
>
>
> On a materialized KTable, out-of-order records for a given key (records which timestamp are older than the current value in store) are not being ignored but used to update the local store value and also being forwarded.
> I believe the bug is here: [https://github.com/apache/kafka/blob/2.6.0/streams/src/main/java/org/apache/kafka/streams/state/internals/ValueAndTimestampSerializer.java#L77] It should return true, not false (see javadoc)
> The bug impacts here: [https://github.com/apache/kafka/blob/2.6.0/streams/src/main/java/org/apache/kafka/streams/kstream/internals/KTableSource.java#L142-L148]
> I have attached a simple stream app that shows the issue happening.
> Thank you!
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