LongWangXX opened a new pull request #16417:
URL: https://github.com/apache/flink/pull/16417
## What is the purpose of the change
Fix FLINK-22969, verify that topic is not null and not an empty string when
creating KafkaSourceFunction and KafkaSinkFunction。
## Brief change log
The KafkaTopicsDescriptor object will be created in the constructor of the
FlinkKafkaConsumerBase class, and I added a check topic in the constructor of
KafkaTopicsDescriptor to see if the topic is empty。
in FlinkKafkaProducer.FlinkKafkaProducer(
String defaultTopic,
KeyedSerializationSchema<IN> keyedSchema,
FlinkKafkaPartitioner<IN> customPartitioner,
KafkaSerializationSchema<IN> kafkaSchema,
Properties producerConfig,
FlinkKafkaProducer.Semantic semantic,
The int kafkaProducersPoolSize) method is added to check whether the
defaultTopic is empty, because all FlinkKafkaProducer constructors will call
this constructor.
## Verifying this change
This change is a trivial rework without any test coverage.
## 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)
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