pnowojski opened a new pull request #14898:
URL: https://github.com/apache/flink/pull/14898
Make sure that the Task thread actually starts measuring the backpressure
before
we start the measured sleep. The WaitingThread is started from within the
mailbox
so we should first wait until mailbox loop starts idling before we enter the
measured sleep
## Verifying this change
Bug was easy to verify after modifying `WaitingThread` starting sequence
from:
```
executor.submit(
waitingThread::start,
"This task will submit another task to execute after
processing input once.");
```
to:
```
executor.submit(() -> {
waitingThread.start();
Thread.sleep(10);
},
"This task will submit another task to execute after
processing input once.");
```
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (yes / **no** /
don't know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (**not applicable** / docs /
JavaDocs / not documented)
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