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https://issues.apache.org/jira/browse/FLINK-4307?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephan Ewen closed FLINK-4307.
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> Broken user-facing API for ListState
> ------------------------------------
>
> Key: FLINK-4307
> URL: https://issues.apache.org/jira/browse/FLINK-4307
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Priority: Blocker
> Fix For: 1.1.0, 1.2.0
>
>
> The user-facing {{ListState}} is supposed to return an empty list when no
> element is contained in the state.
> A previous change altered that behavior to make it in the runtime classes
> accessible whether a ListState is empty.
> To not break the user-facing API, we need to restore the behavior for
> ListState exposed to the users via the {{RuntimeContext}}.
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