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https://issues.apache.org/jira/browse/FLINK-8718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16372641#comment-16372641
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ASF GitHub Bot commented on FLINK-8718:
---------------------------------------

Github user aljoscha commented on the issue:

    https://github.com/apache/flink/pull/5545
  
    Yes, no source can use keyed state. 😄 But the `StateAssignmentOperation` 
will still fail a restore if the `maxParallelism` of an operator changes. Maybe 
@StefanRRichter can chime in on that but I think we need to at least touch 
those parts.


> Non-parallel DataStreamSource does not set max parallelism
> ----------------------------------------------------------
>
>                 Key: FLINK-8718
>                 URL: https://issues.apache.org/jira/browse/FLINK-8718
>             Project: Flink
>          Issue Type: Bug
>          Components: DataStream API, Streaming
>    Affects Versions: 1.5.0
>            Reporter: Gary Yao
>            Assignee: Gary Yao
>            Priority: Major
>             Fix For: 1.5.0
>
>
> {{org.apache.flink.streaming.api.datastream.DataStreamSource}} does not set 
> {{maxParallelism}} to 1 if it is non-parallel.



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