Stephan Pelikan created FLINK-21308:
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             Summary: Cancel "sendAfter"
                 Key: FLINK-21308
                 URL: https://issues.apache.org/jira/browse/FLINK-21308
             Project: Flink
          Issue Type: New Feature
          Components: Stateful Functions
            Reporter: Stephan Pelikan


As a user I want to cancel delayed sent messages not needed any more to keep 
state clean.

Use case:
{quote}My use-case is processing business events of customers. Those events are 
triggered by ourself or by the customer depending of what's the current state 
of the ongoing customer's business use-case. We need to monitor delayed/missing 
business events which belong to previous events. For example: the customer has 
to confirm something we did. Depending on what it is the confirmation has to be 
within hours, days or even months. If there is a delay we need to know. But if 
the customer confirms in time we want to cleanup to keep the state small.
{quote}



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