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https://issues.apache.org/jira/browse/FLINK-27738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17541425#comment-17541425
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Shengkai Fang commented on FLINK-27738:
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[~LCER] Sorry for the late response. I think you can refer to the tutorial[1]. 
It tells us you can set topic config by
{code:java}
./kafka-topics.sh --bootstrap-server localhost:9092 --create --topic 
longMessage --partitions 1 \
--replication-factor 1 --config max.message.bytes=20971520  {code}
[1]https://www.baeldung.com/java-kafka-send-large-message

> instance KafkaSink support config topic properties
> --------------------------------------------------
>
>                 Key: FLINK-27738
>                 URL: https://issues.apache.org/jira/browse/FLINK-27738
>             Project: Flink
>          Issue Type: Improvement
>          Components: Connectors / Kafka
>    Affects Versions: 1.15.0
>            Reporter: LCER
>            Priority: Major
>
> I useĀ KafkaSink to config Kafka information as following:
> *KafkaSink.<String>builder()*
>  *.setBootstrapServers(brokers)*
>  *.setRecordSerializer(KafkaRecordSerializationSchema.builder()*
>  *.setTopicSelector(topicSelector)*
>  *.setValueSerializationSchema(new SimpleStringSchema())*
>  *.build()*
>  *)*
>  *.setDeliverGuarantee(DeliveryGuarantee.EXACTLY_ONCE)*
>  *.setKafkaProducerConfig(properties)*
>  *.build();*
> *----------------*
> *I can't find any method to support config topic properties*



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