radai rosenblatt created KAFKA-4289:
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Summary: 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
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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