[jira] [Commented] (SPARK-20597) KafkaSourceProvider falls back on path as synonym for topic

["Valeria Vasylieva (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-20597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16813195#comment-16813195 ] 

Valeria Vasylieva commented on SPARK-20597:
-------------------------------------------

[~jlaskowski] kindly ask you to review the PR, so that this task would not hang on.

> KafkaSourceProvider falls back on path as synonym for topic
> -----------------------------------------------------------
>
>                 Key: SPARK-20597
>                 URL: https://issues.apache.org/jira/browse/SPARK-20597
>             Project: Spark
>          Issue Type: Improvement
>          Components: Structured Streaming
>    Affects Versions: 2.2.0
>            Reporter: Jacek Laskowski
>            Priority: Trivial
>              Labels: starter
>
> # {{KafkaSourceProvider}} supports {{topic}} option that sets the Kafka topic to save a DataFrame's rows to
> # {{KafkaSourceProvider}} can use {{topic}} column to assign rows to Kafka topics for writing
> What seems a quite interesting option is to support {{start(path: String)}} as the least precedence option in which {{path}} would designate the default topic when no other options are used.
> {code}
> df.writeStream.format("kafka").start("topic")
> {code}
> See http://apache-spark-developers-list.1001551.n3.nabble.com/KafkaSourceProvider-Why-topic-option-and-column-without-reverting-to-path-as-the-least-priority-td21458.html for discussion



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