damjad opened a new pull request #13367:
URL: https://github.com/apache/flink/pull/13367
## What is the purpose of the change
CSV Reader was not parsing data when no field names are passed as an
argument with a POJO type.
## Brief change log
* Added a check to see if the field names are specified when reading from a
CSV file with a POJO.
## Verifying this change
This change added tests and can be verified as follows:
- Added a test to check if the field names are not specified then throw
_IllegalArgumentException_.
## 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/Mesos, 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? (not applicable)
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