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https://issues.apache.org/jira/browse/KAFKA-7779?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Gustafson resolved KAFKA-7779.
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Resolution: Fixed
> Avoid unnecessary loop iteration in leastLoadedNode
> ---------------------------------------------------
>
> Key: KAFKA-7779
> URL: https://issues.apache.org/jira/browse/KAFKA-7779
> Project: Kafka
> Issue Type: Improvement
> Components: network
> Affects Versions: 2.1.0
> Reporter: huxihx
> Assignee: huxihx
> Priority: Minor
>
> In NetworkClient.leastLoadedNode, it invokes `isReady` to check if an
> established connection exists for the given node. `isReady` checks whether
> metadata needs to be updated also which wants to make metadata request first
> priority. However, if the to-be-sent request is metadata request, then we do
> not have to check this otherwise the loop in `leastLoadedNode` will do a
> complete iteration until the final node is selected. That's not performance
> efficient for a large cluster.
>
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