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https://issues.apache.org/jira/browse/FLINK-32275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17730095#comment-17730095
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Weijie Guo commented on FLINK-32275:
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[~masteryhx] Thanks for the quick reply! Let them talk to each other sounds
good. As for {{SimpleSource#initializeState}}, adding a check to it is a good
idea.
> 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
> Components: Runtime / State Backends
> Reporter: Weijie Guo
> Assignee: Hangxiang Yu
> 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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