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https://issues.apache.org/jira/browse/FLINK-2007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14541668#comment-14541668
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Márton Balassi commented on FLINK-2007:
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I have a working prototype, the API needs cleanup before opening the PR.
https://github.com/mbalassi/flink/commit/84f5cb75e5aa4616baea322a3d508433c86c1de7
> Initial data point in Delta function needs to be serializable
> -------------------------------------------------------------
>
> Key: FLINK-2007
> URL: https://issues.apache.org/jira/browse/FLINK-2007
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Affects Versions: 0.9
> Reporter: Márton Balassi
> Assignee: Márton Balassi
> Labels: serialization, windowing
> Fix For: 0.9
>
>
> Currently we expect the data point passed to the delta function to be
> serializable, which breaks the serialization assumptions provided in other
> parts of the code.
> This information should be properly serialized by Flink serializers instead.
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