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https://issues.apache.org/jira/browse/KAFKA-7779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16731870#comment-16731870
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ASF GitHub Bot commented on KAFKA-7779:
---
huxihx commented on pull request #6081: KAFKA-7779: Avoid unnecessary loop
iteration in leastLoadedNode
URL: https://github.com/apache/kafka/pull/6081
https://issues.apache.org/jira/browse/KAFKA-7779
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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### Committer Checklist (excluded from commit message)
- [ ] Verify design and implementation
- [ ] Verify test coverage and CI build status
- [ ] Verify documentation (including upgrade notes)
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> 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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