fhueske opened a new pull request, #27962:
URL: https://github.com/apache/flink/pull/27962
## What is the purpose of the change
Enable interruptible timers for PTFs.
## Brief change log
* Override `useInterruptibleTimers()` in `AbstractProcessTableOperator` to
return `true`, activating the `MailboxWatermarkProcessor` for PTF operators.
This allows timer firing to be interrupted between mailbox iterations,
improving throughput by not blocking mailbox processing during large timer
batches.
* Also reorder `processWatermark()` to call `ingestWatermarkEvent()` before
`super.processWatermark()`, ensuring all timer callbacks (including those
deferred across mailbox iterations) see a consistent watermark in the runner.
This matches the behavior of `WritableInternalTimeContext.currentWatermark()`,
which reads from the timer service and already sees the new watermark before
any timer fires.
## Verifying this change
TODO: add tests
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): **no**
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: **no**
- The serializers: **no**
- The runtime per-record code paths (performance sensitive): **no**
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: **no**
- The S3 file system connector: **no**
## Documentation
- Does this pull request introduce a new feature? **no**
- If yes, how is the feature documented? **n/a**
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