[jira] [Resolved] (KAFKA-7080) WindowStoreBuilder incorrectly initializes CachingWindowStore

["John Roesler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-7080?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

John Roesler resolved KAFKA-7080.
---------------------------------
    Resolution: Fixed

Fixed in https://github.com/apache/kafka/pull/5257

> WindowStoreBuilder incorrectly initializes CachingWindowStore
> -------------------------------------------------------------
>
>                 Key: KAFKA-7080
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7080
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>    Affects Versions: 1.0.0, 1.0.1, 1.1.0, 2.0.0
>            Reporter: John Roesler
>            Assignee: John Roesler
>            Priority: Major
>             Fix For: 2.1.0
>
>
> When caching is enabled on the WindowStoreBuilder, it creates a CachingWindowStore. However, it incorrectly passes storeSupplier.segments() (the number of segments) to the segmentInterval argument.
>  
> The impact is low, since any valid number of segments is also a valid segment size, but it likely results in much smaller segments than intended. For example, the segments may be sized 3ms instead of 60,000ms.
>  
> Ideally the WindowBytesStoreSupplier interface would allow suppliers to advertise their segment size instead of segment count. I plan to create a KIP to propose this.



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