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https://issues.apache.org/jira/browse/KARAF-4753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17105727#comment-17105727
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Oliver Wulff commented on KARAF-4753:
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Hi JB
The way I understood it is when you reduce the timeout and the appender is too
slow to process the events the slow appender gets blacklisted. But the events
still stay in the topic/queue and consume memory and keep GC busy.
Thanks
Oli
> Kafka appender highly uses CPU when using non existing DNS server name
> ----------------------------------------------------------------------
>
> Key: KARAF-4753
> URL: https://issues.apache.org/jira/browse/KARAF-4753
> Project: Karaf
> Issue Type: Bug
> Components: decanter
> Reporter: Jean-Baptiste Onofré
> Assignee: Jean-Baptiste Onofré
> Priority: Minor
> Attachments: high_cpu_karaf.xlsx
>
>
> If you add a DNS name for Kafka for a not existing server, the appender will
> result in a very high CPU usage (near to 100%).
> This will also be the case, when you define mutliple kafka server locations
> and if just one of the DNS names are not resolved.
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