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https://issues.apache.org/jira/browse/FLINK-26392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17498807#comment-17498807
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Dawid Wysakowicz commented on FLINK-26392:
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I found a PoC from [~jqin] : https://github.com/becketqin/flink/tree/FLINK-20270
> Support externally induced sources in MultipleInputStreamTask
> -------------------------------------------------------------
>
> Key: FLINK-26392
> URL: https://issues.apache.org/jira/browse/FLINK-26392
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Checkpointing, Runtime / Task
> Reporter: Dawid Wysakowicz
> Priority: Major
>
> As of now the {{ExternallyInducedSourceReader}} is not supported in
> {{MultipleInputStreamTask}}, which means it does not work if sources are
> chained.
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