title: Can't start zookeeper server
body: <p>i tried to start zookeeper with:</p>
  
  <pre><code>/opt/Kafka/kafka_2.10-0.10.0.1/bin/zookeeper-server-start.sh  
  /opt/Kafka/kafka_2.10-0.10.0.1/config/zookeeper.properties   
  </code></pre>
  
  <p>but I got</p>
  
  <blockquote>
    <p>ERROR Unexpected exception, exiting abnormally (org.apache.zookeeper.server.ZooKeeperServerMain)
    java.net.BindException: Address already in use</p>
  </blockquote>
  
  <p>I restarted the computer and I got the same problem<br>
  I tried <strong>netstat -nlp|grep 2181</strong> the result: </p>
  
  <pre><code>tcp6       0      0 :::2181                 :::*                    LISTEN   
  </code></pre>
  
  <p><strong>kill -9 2181</strong> --> bash: kill: (2181) - No such process</p>
  
  <pre><code>./zookeeper-server-stop.sh  # no result so it works but 
  ./zookeeper-server-start.sh /opt/Kafka/kafka_2.10-0.10.0.1/config/zookeeper.properties # the same exception 
  </code></pre>
  
  <p>what can I do?</p>
  
  <p>Note: when starting kafka server there is no exception</p>