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https://issues.apache.org/jira/browse/FLINK-4859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15714853#comment-15714853
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Robert Metzger commented on FLINK-4859:
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I see the value of refactoring this, but I wonder if its really a blocking
issue for the 1.2 release.
> Clearly Separate Responsibilities of StreamOperator and StreamTask
> ------------------------------------------------------------------
>
> Key: FLINK-4859
> URL: https://issues.apache.org/jira/browse/FLINK-4859
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Reporter: Aljoscha Krettek
> Priority: Blocker
>
> Currently, {{StreamTask}} and {{StreamOperator}} perform a complicated dance
> for certain operations. For example, when restoring from a snapshot, the
> state backends are restored in the {{StreamTask}}, but only after
> {{StreamTask}} calls restore on the operator and the operator asks for the
> backends. There is no clear separation/modularisation with properly defined
> interfaces right now.
> The code works right now but maintainability/understandability could be
> greatly improved.
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