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https://issues.apache.org/jira/browse/BEAM-12578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17417191#comment-17417191
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Beam JIRA Bot commented on BEAM-12578:
--------------------------------------
This issue was marked "stale-P2" and has not received a public comment in 14
days. It is now automatically moved to P3. If you are still affected by it, you
can comment and move it back to P2.
> Illegal parameter type: OnWindowExpirationContextParameter
> ----------------------------------------------------------
>
> Key: BEAM-12578
> URL: https://issues.apache.org/jira/browse/BEAM-12578
> Project: Beam
> Issue Type: Bug
> Components: beam-model
> Affects Versions: 2.29.0
> Reporter: Stefan Wachter
> Priority: P3
>
> {{OnWindowsExpirationContext}} can not be used as a parameter for {{DoFn}}
> methods annotated by {{@OnWindowExpiration}}. The following exception is
> raised:
> {code:java}
> java.lang.IllegalArgumentException:
> org.opennms.nephron.cortex.PaneAccumulator$PaneCombinerFn: Illegal parameter
> type: OnWindowExpirationContextParameter{}{code}
> As a workaround a parameter of type {{OutputReceiver}} can be used, though.
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