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https://issues.apache.org/jira/browse/SPARK-20597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16765971#comment-16765971
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Jacek Laskowski commented on SPARK-20597:
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[~nimfadora] sure. go ahead.
> 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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