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https://issues.apache.org/jira/browse/FLINK-7731?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16216990#comment-16216990
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Aljoscha Krettek commented on FLINK-7731:
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Thanks, [~gerardg]! 😃
> Trigger on GlobalWindow does not clean state completely
> -------------------------------------------------------
>
> Key: FLINK-7731
> URL: https://issues.apache.org/jira/browse/FLINK-7731
> Project: Flink
> Issue Type: Bug
> Components: Core, DataStream API
> Affects Versions: 1.3.2
> Reporter: Gerard Garcia
> Assignee: Aljoscha Krettek
> Priority: Minor
> Fix For: 1.4.0
>
>
> I have an operator that consists of:
> CoGroup Datastream -> GlobalWindow -> CustomTrigger -> Apply function
> The custom trigger fires and purges the elements after it has received the
> expected number of elements (or when a timeout fires) from one of the streams
> and the apply function merges the elements with the ones received from the
> other stream. It appears that the state of the operator grows continuously so
> it seems it never gets completely cleaned.
> There is a discussion in
> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Clean-GlobalWidnow-state-td15613.html
> that suggests that it may be a bug.
> This job reproduces the issue:
> https://github.com/GerardGarcia/flink-global-window-growing-state
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