[jira] [Commented] (FLINK-5221) Checkpointed workless in Window Operator

["Aljoscha Krettek (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-5221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15724281#comment-15724281 ] 

Aljoscha Krettek commented on FLINK-5221:
-----------------------------------------

FLINK-5250 would be the general fix for this.

> Checkpointed workless in Window Operator
> ----------------------------------------
>
>                 Key: FLINK-5221
>                 URL: https://issues.apache.org/jira/browse/FLINK-5221
>             Project: Flink
>          Issue Type: Bug
>          Components: DataStream API
>    Affects Versions: 1.2.0, 1.1.3
>         Environment: SUSE
>            Reporter: Syinchwun Leo
>              Labels: windows
>             Fix For: 1.2.0
>
>   Original Estimate: 12h
>  Remaining Estimate: 12h
>
> When window OPERATOR making checkpoint like this:
> class WindowStatistic extends WindowFunction[Event, Int, Tuple, TimeWindow] with Checkpointed[Option[List[Event]]] {
>     override def appley().... 
>     override def snapshotState()...
>     override def restoreState()
> }
> Window Operator couldn't invoke user defined function "snapshotState()". In debug model, line 123 in AbstractUdfStreamOperator.java returns false and can't make user defined state when checking the window whether is a Checkpointed instance. I think there is something wrong in userFunction var, it's a ScalaWindowFunctionWrapper object and it couldn't reflect if the user defined window extend Checkpointed Interface. Actually, the user defined window is kept in "func" var of userFunction. 



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