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https://issues.apache.org/jira/browse/KAFKA-4289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismael Juma resolved KAFKA-4289.
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Resolution: Fixed
> CPU wasted on reflection calls initializing short-lived loggers
> ---------------------------------------------------------------
>
> Key: KAFKA-4289
> URL: https://issues.apache.org/jira/browse/KAFKA-4289
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.10.0.1
> Reporter: radai rosenblatt
> Fix For: 0.10.2.0
>
>
> an internal profiling run at linkedin found ~5% of the CPU time consumed by
> `sun.reflect.Reflection.getCallerClass()`.
> digging into the stack trace shows its from initializing short lived logger
> objects in `FileMessageSet` and `RequestChannel.Request`
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