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From "siva santhalingam (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (KAFKA-5784) Add a sensor for dropped records in window stores
Date Mon, 11 Dec 2017 16:35:18 GMT

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

siva santhalingam reassigned KAFKA-5784:
----------------------------------------

    Assignee: siva santhalingam

> 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
>              Labels: newbie
>
> 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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