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Posted to issues@beam.apache.org by "Pablo Estrada (JIRA)" <ji...@apache.org> on 2019/04/28 06:20:00 UTC

[jira] [Commented] (BEAM-7167) Unable to cancel a DoFn Timer

    [ https://issues.apache.org/jira/browse/BEAM-7167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16827832#comment-16827832 ] 

Pablo Estrada commented on BEAM-7167:
-------------------------------------

I should take a look at this.

> Unable to cancel a DoFn Timer
> -----------------------------
>
>                 Key: BEAM-7167
>                 URL: https://issues.apache.org/jira/browse/BEAM-7167
>             Project: Beam
>          Issue Type: Bug
>          Components: beam-model
>    Affects Versions: 2.12.0
>            Reporter: Neil Kolban
>            Assignee: Pablo Estrada
>            Priority: Minor
>
> The following was raised on [Stackoverflow|[https://stackoverflow.com/questions/55875832/how-to-cancel-unset-a-dofn-defined-timer]]:
>  
> Having read [Timely (and Stateful) Processing with Apache Beam|https://beam.apache.org/blog/2017/08/28/timely-processing.html] and looked at the JavaDoc for a [Timer|https://beam.apache.org/releases/javadoc/2.12.0/org/apache/beam/sdk/state/Timer.html], I have successfully setup a timer to be fired. However, I am missing how to request that a timer be cancelled before it has fired. Is this a semantic that is possible / allowable in Beam architecture?
> My back-story is that I wish to register a timer to fire a callback if something has not occurred ... but if it HAS occurred prior to the timer firing, then I wish to cancel the timer from being fired.



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