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https://issues.apache.org/jira/browse/FLINK-7541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16180362#comment-16180362
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Till Rohrmann commented on FLINK-7541:
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Please don't close this JIRA, because the commit was reverted with
142bde0e8410224de821cefe3876afb8bc6aaf1a. The reason was that the usage of
{{Multimap}} cause the {{OperatorSubtaskState}} to be no longer serializable
(more specifically {{ArrayListMultimap#get}} returns a {{Collection}} which is
not {{Serializable}}). This was visible due to the failing
{{WindowCheckpointingITCase}}.
> Redistribute operator state using OperatorID
> --------------------------------------------
>
> Key: FLINK-7541
> URL: https://issues.apache.org/jira/browse/FLINK-7541
> Project: Flink
> Issue Type: Improvement
> Reporter: Piotr Nowojski
> Assignee: Piotr Nowojski
>
> Currently StateAssignmentOperation relays heavily on the order of new and old
> operators in the task. It should be changed and it should relay more on
> OperatorID.
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