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https://issues.apache.org/jira/browse/LOG4J2-1733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15834733#comment-15834733
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Matt Sicker commented on LOG4J2-1733:
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Appenders should throw their exceptions as they are all wrapped by
AppenderControls which handle thrown exceptions (and recursive appender calls
and other housekeeping tasks). There is a setting on all appenders to ignore
exceptions by their underlying appenders which is handled by this which is
normally true by default (though is also normally disabled when using a
failover appender or similar).
> Add SyncSend attribute to 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
> Assignee: Mikael Ståldal
> Fix For: 2.8
>
>
> 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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