kafka启动报错ERROR Processor got uncaught exception以及彻底删除topic

启动kafka
命令：/usr/local/kafka/bin/kafka-server-start.sh -daemon /usr/local/kafka/config/server.properties

报错如下：
[2020-08-18 11:14:49,403] ERROR Processor got uncaught exception. (kafka.network.Processor)
java.lang.ExceptionInInitializerError
    at kafka.network.RequestChannel$Request.<init>(RequestChannel.scala:111)
    at kafka.network.Processor.$anonfun$processCompletedReceives$1(SocketServer.scala:515)
    at kafka.network.Processor.$anonfun$processCompletedReceives$1$adapted(SocketServer.scala:505)
    at scala.collection.Iterator.foreach(Iterator.scala:929)
    at scala.collection.Iterator.foreach$(Iterator.scala:929)
    at scala.collection.AbstractIterator.foreach(Iterator.scala:1406)
    at scala.collection.IterableLike.foreach(IterableLike.scala:71)
    at scala.collection.IterableLike.foreach$(IterableLike.scala:70)
    at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
    at kafka.network.Processor.processCompletedReceives(SocketServer.scala:505)
    at kafka.network.Processor.run(SocketServer.scala:433)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.UnknownHostException: QA-server: QA-server: Name or service not known
    at java.net.InetAddress.getLocalHost(InetAddress.java:1505)
    at kafka.network.RequestChannel$.<init>(RequestChannel.scala:41)
    at kafka.network.RequestChannel$.<clinit>(RequestChannel.scala)
    ... 12 more
[2020-08-18 11:14:50,017] ERROR Processor got uncaught exception. (kafka.network.Processor)
java.lang.NoClassDefFoundError: Could not initialize class kafka.network.RequestChannel$
    at kafka.network.RequestChannel$Request.<init>(RequestChannel.scala:111)
    at kafka.network.Processor.$anonfun$processCompletedReceives$1(SocketServer.scala:515)
    at kafka.network.Processor.$anonfun$processCompletedReceives$1$adapted(SocketServer.scala:505)
    at scala.collection.Iterator.foreach(Iterator.scala:929)
    at scala.collection.Iterator.foreach$(Iterator.scala:929)
    at scala.collection.AbstractIterator.foreach(Iterator.scala:1406)
    at scala.collection.IterableLike.foreach(IterableLike.scala:71)
    at scala.collection.IterableLike.foreach$(IterableLike.scala:70)
    at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
    at kafka.network.Processor.processCompletedReceives(SocketServer.scala:505)
    at kafka.network.Processor.run(SocketServer.scala:433)
    at java.lang.Thread.run(Thread.java:745)

解决方法：

在/etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.2.10 QA-server
QA-server为本机主机名

之后继续重启，依然报错
FATAL Fatal error during KafkaServer startup. Prepare to shutdown (kafka.server.KafkaServer)
kafka.common.InconsistentBrokerIdException: Configured broker.id 2 doesn't match stored broker.id 1 in meta.properties. If you moved your data, make sure your configured broker.id matches. If you intend to create a new broker, you should remove all data in your data directories (log.dirs).
    at kafka.server.KafkaServer.getBrokerId(KafkaServer.scala:689)
    at kafka.server.KafkaServer.startup(KafkaServer.scala:194)
    at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:39)
    at kafka.Kafka$.main(Kafka.scala:67)
    at kafka.Kafka.main(Kafka.scala)

解决方法：

/usr/local/kafka/config/server.properties里修改broker.id=2
/usr/local/kafka/logs/kafka-logs-1/meta.properties里修改broker.id=2
原broker.id=1，修改其它数值，两个配置文件里要保持一致

彻底删除kafka中的topic

方法一：配置参数delete.topic.enable=true没有开启（位置/usr/local/kafka/config/server.properties）
kafka查看topic：/usr/local/kafka/bin/kafka-topics.sh --list --zookeeper xxxx:2181 --topic {topic name}
kafka删除(会显示marked for deletion)：/usr/local/kafka/bin/kafka-topics.sh --delete --zookeeper xxxx:2181 --topic {topic name}
删除kafka存储目录，/usr/local/kafka/config/server.properties里log.dirs配置，默认在/tmp/下

登录zookeeper客户端：/usr/local/zookeeper/bin/zkCli.sh
ls /brokers/topics
rmr /brokers/topics/{topic name}

方法二：配置参数delete.topic.enable=true开启（位置/usr/local/kafka/config/server.properties），重启kafka
kafka删除：/usr/local/kafka/bin/kafka-topics.sh --delete --zookeeper xxxx:2181 --topic {topic name}