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https://issues.apache.org/jira/browse/KAFKA-9862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17083525#comment-17083525
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Cheng Tan commented on KAFKA-9862:
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Thanks. I put critical because it blocks the --zookeeper flag removal. Some
system tests are testing this functionality with Zookeeper. Just changed.
> Enable --if-exists and --if-not-exists for AdminClient in TopicCommand
> ----------------------------------------------------------------------
>
> Key: KAFKA-9862
> URL: https://issues.apache.org/jira/browse/KAFKA-9862
> Project: Kafka
> Issue Type: New Feature
> Reporter: Cheng Tan
> Assignee: Cheng Tan
> Priority: Critical
>
> In *kafka-topic.sh*, we expect to use --if-exists to ensure that the topic to
> create or change exists. Similarly, we expect to use --if-not-exists to
> ensure that the topic to create or change does not exist. Currently, only
> *ZookeeperTopicService* supports these two options and we want to introduce
> them to *AdminClientTopicService.*
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