初学hadoop，运行wordcount，但是一直报zookeeper配置错误，但是安装hadoop集群并没有配置zookeepper，请大神帮忙看一下，如何解决？

报错信息如下：

ERROR server.ZooKeeperServerMain: Invalid arguments, exiting abnormally
java.lang.NumberFormatException: For input string: "xeb.hadoopdemo.Startup"
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
        at java.lang.Integer.parseInt(Integer.java:580)
        at java.lang.Integer.parseInt(Integer.java:615)
        at org.apache.zookeeper.server.ServerConfig.parse(ServerConfig.java:61)
        at org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:86)
        at org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:55)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:119)
        at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:81)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.hadoop.util.RunJar.run(RunJar.java:318)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:232)

运行的程序：

hadoop jar WordCounter.jar xeb.hadoopdemo.Startup /data/wordcount /data/wordcount/output