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https://issues.apache.org/jira/browse/FLINK-5105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fabian Hueske reassigned FLINK-5105:
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Assignee: Fabian Hueske
> 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: Bug
> Components: State Backends, Checkpointing
> Reporter: sunjincheng
> Assignee: Fabian Hueske
>
> 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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