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https://issues.apache.org/jira/browse/KAFKA-5323?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Onur Karaman updated KAFKA-5323:
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Status: Patch Available (was: Open)
> AdminUtils.createTopic should check topic existence upfront
> -----------------------------------------------------------
>
> Key: KAFKA-5323
> URL: https://issues.apache.org/jira/browse/KAFKA-5323
> Project: Kafka
> Issue Type: Improvement
> Reporter: Onur Karaman
> Assignee: Onur Karaman
>
> When a topic exists, AdminUtils.createTopic unnecessarily does N+2 zookeeper
> reads where N is the number of brokers. Here is the breakdown of the N+2
> zookeeper reads:
> # reads the current list of brokers in zookeeper (1 zookeeper read)
> # reads metadata for each broker in zookeeper (N zookeeper reads where N is
> the number of brokers)
> # checks for topic existence in zookeeper (1 zookeeper read)
> We can reduce the N+2 reads down to 1 by checking topic existence upfront.
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