Logback Kafka Appender无法向Topic写入日志求助

最近我在对Logback Kafka Appender做一个简单测试，下面是我放置在src/main/resources目录下的logback.xml配置内容：

<?xml version="1.0" encoding="UTF-8"?> 
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> 
  <encoder> 
    <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> 
  </encoder> 
</appender> 

<!-- This is the kafkaAppender --> 
<appender name="kafkaAppender" class="com.github.dan...

内容的提问来源于stack exchange，提问作者user3044240