Arvid Heise created FLINK-24182:
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Summary: Tasks canceler should not immediately interrupt
Key: FLINK-24182
URL: https://issues.apache.org/jira/browse/FLINK-24182
Project: Flink
Issue Type: Improvement
Components: Runtime / Task
Reporter: Arvid Heise
While debugging resource leaks (FLINK-24131), I found that any connector is
immediately interrupted on cancel. Hence, any attempts of using blocking calls
in {{close}} to cleanup resources are immediately unreliable (e.g. aborting
transactions).
It would be nice if tasks get a grace period (e.g. task.cancellation.interval)
where they can try to free resources in a proper, potentially blocking fashion
before being interrupted.
Nevertheless, connectors should always expect interruptions during shutdown, in
particular when the user-configurable grace period is depleted. I'd add that to
the connector documentation in a separate effort.
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