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https://issues.apache.org/jira/browse/FLINK-3317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15333928#comment-15333928
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ASF GitHub Bot commented on FLINK-3317:
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Github user tillrohrmann commented on the issue:
https://github.com/apache/flink/pull/2041
Will be merging this PR.
> Add timeout handler to CEP operator
> -----------------------------------
>
> Key: FLINK-3317
> URL: https://issues.apache.org/jira/browse/FLINK-3317
> Project: Flink
> Issue Type: Improvement
> Components: CEP
> Affects Versions: 1.0.0
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
> Priority: Minor
>
> Currently, event sequences which exceed the defined pattern timeout will be
> discarded. However, in some cases the user might be interested in getting to
> know when such a timeout occurred to return a default value for these event
> sequences.
> Thus, the pattern API should be extended to be able to define a timeout
> handler. Furthermore, the {{NFA}} has to be extended to also return the
> discarded event sequences. The {{CEPOperator}} would then call for every
> discarded event sequence the timeout handler.
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