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From "Flink Jira Bot (Jira)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-21278) NullpointExecption error is reported when using the evictor method to filter the data before the window calculation
Date Sun, 30 May 2021 23:16:01 GMT

     [ https://issues.apache.org/jira/browse/FLINK-21278?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Flink Jira Bot updated FLINK-21278:
-----------------------------------
    Labels: auto-deprioritized-critical pull-request-available stale-major  (was: auto-deprioritized-critical
pull-request-available)

I am the [Flink Jira Bot|https://github.com/apache/flink-jira-bot/] and I help the community
manage its development. I see this issues has been marked as Major but is unassigned and neither
itself nor its Sub-Tasks have been updated for 30 days. I have gone ahead and added a "stale-major"
to the issue". If this ticket is a Major, please either assign yourself or give an update.
Afterwards, please remove the label or in 7 days the issue will be deprioritized.


> NullpointExecption error is reported when using the evictor method to filter the data
before the window calculation
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-21278
>                 URL: https://issues.apache.org/jira/browse/FLINK-21278
>             Project: Flink
>          Issue Type: Bug
>          Components: API / DataStream
>    Affects Versions: 1.12.1
>            Reporter: HunterHunter
>            Priority: Major
>              Labels: auto-deprioritized-critical, pull-request-available, stale-major
>
> When I use evictor() method to filter the data before a window is triggered, if there
is no data that meets the conditions, a nullpointExecption error will be reported.
> This problem occurs in the ReduceApplyWindowFunction.apply method.
> So I think if there is no data to calculate whether it can not trigger the calculation,
or judge whether it is null before transmitting the calculation result



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