[jira] [Updated] (KAFKA-10493) KTable out-of-order updates are not being ignored

["Matthias J. Sax (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-10493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias J. Sax updated KAFKA-10493:
------------------------------------
    Fix Version/s:     (was: 3.0.0)
                   4.0.0

> 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
>            Assignee: Matthias J. Sax
>            Priority: Blocker
>             Fix For: 4.0.0
>
>         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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