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Posted to dev@kafka.apache.org by "Guozhang Wang (JIRA)" <ji...@apache.org> on 2019/04/08 17:59:00 UTC

[jira] [Resolved] (KAFKA-5784) Add a sensor for dropped records in window stores

     [ https://issues.apache.org/jira/browse/KAFKA-5784?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guozhang Wang resolved KAFKA-5784.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 2.1.0

> Add a sensor for dropped records in window stores
> -------------------------------------------------
>
>                 Key: KAFKA-5784
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5784
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>            Reporter: Guozhang Wang
>            Assignee: siva santhalingam
>            Priority: Major
>              Labels: newbie
>             Fix For: 2.1.0
>
>
> Today when a {{put(record)}} call on a windowed store does not find the corresponding segment, i.e. its corresponding's window has expired, we simply returns a {{null}} and hence silently drops it.
> We should consider 1) add log4j entries when it happens, 2) add metrics (we can discuss whether it should be a processor-node level, or store level sensor) for such cases.



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