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https://issues.apache.org/jira/browse/KAFKA-14556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luke Chen updated KAFKA-14556:
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Summary: log cleaner throttler start time is wrong when 1st run (was: log
cleaner throttler start time is correct)
> log cleaner throttler start time is wrong when 1st run
> ------------------------------------------------------
>
> Key: KAFKA-14556
> URL: https://issues.apache.org/jira/browse/KAFKA-14556
> Project: Kafka
> Issue Type: Bug
> Reporter: Luke Chen
> Assignee: Luke Chen
> Priority: Major
>
> Log cleaner throttler will do throttling check very 300ms. The expected
> throttling work is like this:
> disk IO operation for 300ms -> check if throttling is needed (sleep to slow
> down the IO) -> continue the disk IO operation -> check ...
>
> But the 300ms interval start time is started when log cleaner created
> [here|https://github.com/jolshan/kafka/blob/trunk/core/src/main/scala/kafka/utils/Throttler.scala#L49].
> So, even if there's no logs needed to be cleaned, the interval time still
> elapses. When logs appeared and ready to be cleaned, the 300ms interval will
> exceed immediately and start to verify if throttling is needed, which is
> unexpected.
>
>
>
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