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https://issues.apache.org/jira/browse/KAFKA-15250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17837836#comment-17837836
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Philip Nee commented on KAFKA-15250:
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Added a testing branch under my fork: network-thread-mbean-metrics
I ran the testAsyncCommit in the integration test (because it actually polls).
These are the stats:
backoff time avg:0.29459381324082107
(backoff time max,92.0)
poll time avg:9.2161365261735107E18
(poll time max,9.223372036854776E18)
The loop doesn't really backoff.
> ConsumerNetworkThread is running tight loop
> -------------------------------------------
>
> Key: KAFKA-15250
> URL: https://issues.apache.org/jira/browse/KAFKA-15250
> Project: Kafka
> Issue Type: Bug
> Components: clients, consumer
> Reporter: Philip Nee
> Assignee: Kirk True
> Priority: Critical
> Labels: consumer-threading-refactor, events
> Fix For: 3.8.0
>
>
> The DefaultBackgroundThread is running tight loops and wasting CPU cycles. I
> think we need to reexamine the timeout pass to networkclientDelegate.poll.
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