title: hbase zookeeper client connect issue
body: <p>I received the below error in zookeeper when I log in my cluster environment. I am using the default zookeeper which comes along with hbase.</p>
  
  <pre><code>HBase is able to connect to ZooKeeper but the connection closes immediately. 
  This could be a sign that the server has too many connections (30 is the default)
  Consider inspecting your ZK server logs for that error and then make sure you  
  are reusing HBase Configuration as often as you can. See HTable's javadoc for
  more information.
  </code></pre>