StephanEwen opened a new pull request #14259:
URL: https://github.com/apache/flink/pull/14259
## What is the purpose of the change
This changes the split duplication problem in the new source framework, as
initially observed on the File Source.
The issues are independent of the file source and affect all sources
implemented against the new framework.
This PR combines the changes from
- #14256 - Add `resetSubtask()` to `OperatorCoordinator`
- #14199 - Add runtime failure tests based on the File Source
We need to squash some commits during merging.
## Verifying this change
This PR adds significant test coverage via the extension of the
`FileTextLinesITCase` with TaskManager and JobManager failures.
## 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):
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: **yes**
- The S3 file system connector: **no**
## Documentation
- Does this pull request introduce a new feature? **no**
- If yes, how is the feature documented? **not applicable****no**
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