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https://issues.apache.org/jira/browse/LOG4J2-1824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15884136#comment-15884136
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Matt Sicker commented on LOG4J2-1824:
-------------------------------------
I also found this [alternative Kafka client
library|https://github.com/blackberry/Krackle/] from the Kafka wiki if it turns
out that decreasing temporary objects in the client itself is too difficult.
> (GC) Avoid allocating temporary objects in KafkaAppender
> --------------------------------------------------------
>
> Key: LOG4J2-1824
> URL: https://issues.apache.org/jira/browse/LOG4J2-1824
> Project: Log4j 2
> Issue Type: Improvement
> Components: Appenders
> Reporter: Matt Sicker
>
> Due to API limitations in kafka-clients, log messages must be encoded into
> byte arrays rather than directly into ByteBuffers via
> {{Encoder<LogEvent>}}-enhanced layouts. I've opened up KAFKA-4802 to get
> support on the client side for not converting the provided ByteBuffers back
> into a byte array, but in the meantime, KafkaAppender and KafkaManager can be
> enhanced to use the Encoder API.
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