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https://issues.apache.org/jira/browse/FLINK-7971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tzu-Li (Gordon) Tai reopened FLINK-7971:
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> Fix potential NPE with inconsistent state
> -----------------------------------------
>
> Key: FLINK-7971
> URL: https://issues.apache.org/jira/browse/FLINK-7971
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Reporter: Ruidong Li
> Assignee: Ruidong Li
> Priority: Major
> Fix For: 1.4.0, 1.5.0, 1.3.4
>
>
> In {{GroupAggProcessFunction}}， the status of {{state}} and {{cntState}} are
> not consistent, which may cause NPE when {{state}} is not null but
> {{cntState}} is null.
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