安装zookeeper，启动zookeeper后，kafka无法启动，报以下错误：

[2019-08-07 15:24:03,002] ERROR [KafkaServer id=0] Fatal error during KafkaServer startup. Prepare to shutdown (kafka.server.KafkaServer)
java.lang.NoSuchMethodError: org.apache.zookeeper.ZooKeeper.multi(Ljava/lang/Iterable;Lorg/apache/zookeeper/AsyncCallback$MultiCallback;Ljava/lang/Object;)V
    at kafka.zookeeper.ZooKeeperClient.send(ZooKeeperClient.scala:222)
    at kafka.zookeeper.ZooKeeperClient.$anonfun$handleRequests$2(ZooKeeperClient.scala:144)
    at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
    at kafka.utils.CoreUtils$.inLock(CoreUtils.scala:251)
    at kafka.utils.CoreUtils$.inReadLock(CoreUtils.scala:257)
    at kafka.zookeeper.ZooKeeperClient.$anonfun$handleRequests$1(ZooKeeperClient.scala:144)
    at kafka.zookeeper.ZooKeeperClient.$anonfun$handleRequests$1$adapted(ZooKeeperClient.scala:140)
    at scala.collection.mutable.ResizableArray.foreach(ResizableArray.scala:62)
    at scala.collection.mutable.ResizableArray.foreach$(ResizableArray.scala:55)
    at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:49)
    at kafka.zookeeper.ZooKeeperClient.handleRequests(ZooKeeperClient.scala:140)
    at kafka.zk.KafkaZkClient.retryRequestsUntilConnected(KafkaZkClient.scala:1660)
    at kafka.zk.KafkaZkClient.retryRequestsUntilConnected(KafkaZkClient.scala:1647)
    at kafka.zk.KafkaZkClient.retryRequestUntilConnected(KafkaZkClient.scala:1642)
    at kafka.zk.KafkaZkClient$CheckedEphemeral.create(KafkaZkClient.scala:1712)
    at kafka.zk.KafkaZkClient.checkedEphemeralCreate(KafkaZkClient.scala:1689)
    at kafka.zk.KafkaZkClient.registerBroker(KafkaZkClient.scala:97)
    at kafka.server.KafkaServer.startup(KafkaServer.scala:260)
    at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:38)
    at kafka.Kafka$.main(Kafka.scala:75)
    at kafka.Kafka.main(Kafka.scala)

原因分析：未配置java环境变量或java环境变量重复
解决办法：添加java环境变量到/etc/profile