[jira] [Closed] (FLINK-2968) Windowed fold operation fails because the initial value was not serialized

["Maximilian Michels (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-2968?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Maximilian Michels closed FLINK-2968.
-------------------------------------
       Resolution: Fixed
    Fix Version/s: 0.10

master: 59685903e6460dcba24b68d48ecd8d6a819e81b5
release-0.10: af05911b08e4c4e3380d3ee8d693490a48796720

> Windowed fold operation fails because the initial value was not serialized
> --------------------------------------------------------------------------
>
>                 Key: FLINK-2968
>                 URL: https://issues.apache.org/jira/browse/FLINK-2968
>             Project: Flink
>          Issue Type: Bug
>    Affects Versions: 0.10
>            Reporter: Till Rohrmann
>            Assignee: Till Rohrmann
>             Fix For: 0.10
>
>
> The windowed fold operation currently fails because the initial value was not serialized. The reason for this is that the fold operation is realized as a {{WindowFunction}} within an {{AbstractUdfStreamOperator}} and does not get the output type information forwarded (which is necessary for the serialization). 
> The solution is to let the {{AbstractUdfStreamOperator}} forward the output type information to the {{WindowFunction}} if it implements the {{OutputTypeConfigurable}} interface.



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