报错如下
[2021-11-19 16:00:07,685] ERROR Processor got uncaught exception. (kafka.network.Processor)
java.lang.NoClassDefFoundError: Could not initialize class kafka.network.RequestChannel$
at kafka.network.RequestChannel$Request.(RequestChannel.scala:124)
at kafka.network.Processor$$anonfun$processCompletedReceives$1.apply(SocketServer.scala:518)
at kafka.network.Processor$$anonfun$processCompletedReceives$1.apply(SocketServer.scala:511)
at scala.collection.Iterator$class.foreach(Iterator.scala:891)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
at kafka.network.Processor.processCompletedReceives(SocketServer.scala:511)
at kafka.network.Processor.run(SocketServer.scala:436)
at java.lang.Thread.run(Thread.java:748)
解决：
kill正在运行的进程，修改/etc/hosts配置 启动进程，解决 ./kafka-server-start.sh -daemon ../config/server.properties
