[jira] [Created] (FLINK-20849) Improve JavaDoc and logging of new KafkaSource

[Shang Yuanchun (Jira)]

Qingsheng Ren created FLINK-20849:
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             Summary: Improve JavaDoc and logging of new KafkaSource
                 Key: FLINK-20849
                 URL: https://issues.apache.org/jira/browse/FLINK-20849
             Project: Flink
          Issue Type: Improvement
          Components: Connectors / Kafka
            Reporter: Qingsheng Ren
             Fix For: 1.13.0, 1.12.1


Some JavaDoc and logging message of the new KafkaSource should be more descriptive to provide more information to users. 



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