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https://issues.apache.org/jira/browse/FLINK-5247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15724298#comment-15724298
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Aljoscha Krettek commented on FLINK-5247:
-----------------------------------------

I see. Thanks for looking into this!

I actually have a fix for this (ignore allowedLateness for processing time) 
buried in this PR: 
https://github.com/apache/flink/pull/2572/files#diff-408a499e1a35840c52e29b7ccab866b1R525
 (You can look at WindowOperator.cleanupTime()).

I think it would be better to ignore setting an allowed lateness for processing 
time. But you're right that the checks should be fixed.

> Setting allowedLateness to a non-zero value should throw exception for 
> processing-time windows
> ----------------------------------------------------------------------------------------------
>
>                 Key: FLINK-5247
>                 URL: https://issues.apache.org/jira/browse/FLINK-5247
>             Project: Flink
>          Issue Type: Bug
>          Components: Streaming
>    Affects Versions: 1.1.0, 1.1.1, 1.1.2, 1.1.3
>            Reporter: Rohit Agarwal
>
> Related to FLINK-3714 and FLINK-4239



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