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https://issues.apache.org/jira/browse/FLINK-3525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15169431#comment-15169431
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Stephan Ewen commented on FLINK-3525:
-------------------------------------
Thanks for noticing, just fixed it...
> Missing call to super#close() in
> TimestampsAndPeriodicWatermarksOperator#close()
> --------------------------------------------------------------------------------
>
> Key: FLINK-3525
> URL: https://issues.apache.org/jira/browse/FLINK-3525
> Project: Flink
> Issue Type: Bug
> Reporter: Ted Yu
> Priority: Minor
>
> Here is related code:
> {code}
> public void close() throws Exception {
> // emit a final watermark
> {code}
> AbstractUdfStreamOperator#close() should be called.
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