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https://issues.apache.org/jira/browse/FLINK-5105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17323689#comment-17323689
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Flink Jira Bot commented on FLINK-5105:
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This issue is assigned but has not received an update in 7 days so it has been
labeled "stale-assigned". If you are still working on the issue, please give an
update and remove the label. If you are no longer working on the issue, please
unassign so someone else may work on it. In 7 days the issue will be
automatically unassigned.
> Improve ReduceState: value put into ReducingState should always be a copy
> -------------------------------------------------------------------------
>
> Key: FLINK-5105
> URL: https://issues.apache.org/jira/browse/FLINK-5105
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / State Backends
> Reporter: sunjincheng
> Assignee: Fabian Hueske
> Priority: Major
> Labels: stale-assigned
>
> In case of overlapping sliding windows, multiple references are hold on the
> same object. If we modify value1 or value2 the results are incorrect. The
> value that is put into a ReducingState is always copied. That would allow to
> modify and emit one of the two input values (the one which is comes from the
> state).
> The FoldingState has the same problem.
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