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    via by Unknown author

    Needs to add netty-transport-native-epoll with a OS classifier to the classpath, it's not included in netty-all

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java.lang.ClassNotFoundException: org.apache.kafka.clients.producer.Callback	at	at java.lang.ClassLoader.loadClass(	at sun.misc.Launcher$AppClassLoader.loadClass(	at java.lang.ClassLoader.loadClass(	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(	at org.syslog_ng.SyslogNgClassLoader.loadClass(