[jira] [Commented] (FLINK-32275) The return value of PartitionableListState#get is inconsistent with the requirements of AppendingState

["Weijie Guo (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-32275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17730010#comment-17730010 ] 

Weijie Guo commented on FLINK-32275:
------------------------------------

[~masteryhx] Would you mind taking a look at this? Thanks.

> The return value of PartitionableListState#get is inconsistent with the requirements of AppendingState
> ------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-32275
>                 URL: https://issues.apache.org/jira/browse/FLINK-32275
>             Project: Flink
>          Issue Type: Technical Debt
>            Reporter: Weijie Guo
>            Priority: Major
>
> The java doc of {{AppendingState#get()}} states that if the state is empty, then this method should return {{null}}. But for it's child class {{PartitionableListState}}, It does return a empty list instead of {{null}}. This has caused some confusion ,especially {{AppendingState}} is a {{PublicEvolving}} API.



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