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https://issues.apache.org/jira/browse/FLINK-14122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17016765#comment-17016765
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Tzu-Li (Gordon) Tai commented on FLINK-14122:
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One reason I see with supporting this is that people who were previously using
{{ListCheckpointed}} (its still annotate as public evolving and not deprecated)
have a way out using the state processor API to migrate their state offline.
> Extend State Processor API to read ListCheckpointed operator state
> ------------------------------------------------------------------
>
> Key: FLINK-14122
> URL: https://issues.apache.org/jira/browse/FLINK-14122
> Project: Flink
> Issue Type: Sub-task
> Components: API / DataStream
> Affects Versions: 1.10.0
> Reporter: Seth Wiesman
> Priority: Major
> Labels: usability
> Fix For: 1.11.0
>
>
> The state processor api cannot read operator state using the
> ListCheckpointed interface because it requires access the JavaSerializer
> which is package private. Instead of making that class public, we should
> offer a readListCheckpointed Method to easily read this state.
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