[jira] [Comment Edited] (KAFKA-6443) KTable involved in multiple joins could result in duplicate results

["Maatari (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-6443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17069222#comment-17069222 ] 

Maatari edited comment on KAFKA-6443 at 3/28/20, 5:18 AM:
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Hi all, is there a way to know what is the status of this ticket ? We are heavy user of KTable multiple join including the scenario above, and have noticed indeed, an unusual/substantial amount of intermediated result being generated downstream


was (Author: maatdeamon):
Hi all, is there a way to know what is the status of this ticket ? We are heavy user of KTable multiple join and have noticed indeed, an unusual/substantial amount of intermediated result being generated downstream

> KTable involved in multiple joins could result in duplicate results
> -------------------------------------------------------------------
>
>                 Key: KAFKA-6443
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6443
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>            Reporter: Guozhang Wang
>            Priority: Major
>
> Consider the following multi table-table joins:
> {code}
> table1.join(table2).join(table2);    // "join" could be replaced with "leftJoin" and "outerJoin"
> {code}
> where {{table2}} is involved multiple times in this multi-way joins. In this case, when a new record from the source topic of {{table2}} is being processing, it will send to two children down in the topology and hence may resulting in duplicated join results depending on the join types.



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