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https://issues.apache.org/jira/browse/LOG4J2-1733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15742440#comment-15742440
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Vincent Tieleman commented on LOG4J2-1733:
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Yes, I tried wrap the KafkaAppender with an AsyncAppender, this does not speed
up the communication with Kafka however. It merely allowed the application to
run faster than the messages are sent to Kafka, but eventually blocks when the
queue is full.
> Introduce SyncSend property for KafkaAppender (as in KafkaLog4jAppender)
> ------------------------------------------------------------------------
>
> Key: LOG4J2-1733
> URL: https://issues.apache.org/jira/browse/LOG4J2-1733
> Project: Log4j 2
> Issue Type: Improvement
> Components: Appenders
> Affects Versions: 2.5
> Environment: Kafka 0.10.1.0
> Reporter: Vincent Tieleman
>
> The KafkaLog4jAppender (shipped with Kafka and usable with log4j), has a
> syncsend property that improves performance significantly by not blocking a
> send to Kafka. I've tried many other configuration settings and setups, but
> find that none of these approaches improved the logging performance to Kafka
> as significantly as setting the syncsend property to false.
> Unfortunately, the syncsend property is not supported by the KafkaAppender
> shipped with log4j2 and the KafkaLog4jAppender only supports log4j, so I am
> stuck with forking the code and making the change myself.
> Could you please introduce this property in the KafkaAppender in log4j2?
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