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

報錯如下：
[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)

解決方法：
 

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為本機主機名

之後繼續重啟，依然報錯
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)

解決方法：

/usr/local/kafka/config/server.properties裡修改broker.id=2
/usr/local/kafka/logs/kafka-logs-1/meta.properties裡修改broker.id=2
原broker.id=1，修改其它數值，兩個配置檔案裡要保持一致

徹底刪除kafka中的topic

方法一：配置引數delete.topic.enable=true沒有開啟（位置/usr/local/kafka/config/server.properties）
kafka檢視topic：/usr/local/kafka/bin/kafka-topics.sh --list --zookeeper xxxx:2181 --topic {topic name}
kafka刪除(會顯示marked for deletion)：/usr/local/kafka/bin/kafka-topics.sh --delete --zookeeper xxxx:2181 --topic {topic name}
刪除kafka儲存目錄，/usr/local/kafka/config/server.properties裡log.dirs配置，預設在/tmp/下

登入zookeeper客戶端：/usr/local/zookeeper/bin/zkCli.sh
ls /brokers/topics
rmr /brokers/topics/{topic name}

方法二：配置引數delete.topic.enable=true開啟（位置/usr/local/kafka/config/server.properties），重啟kafka
kafka刪除：/usr/local/kafka/bin/kafka-topics.sh --delete --zookeeper xxxx:2181 --topic {topic name}