title: Zeppelin disconnected
body: <p>I downloaded zeppelin binary package and started it. However it's disconnected.
  Here is the log:</p>
  
  <pre><code> INFO [2016-01-12 14:37:56,592] ({main} QuartzScheduler.java[initialize]:305) - Scheduler meta-data: Quartz Scheduler (v2.2.1) 'Defau
  ltQuartzScheduler' with instanceId 'NON_CLUSTERED'
    Scheduler class: 'org.quartz.core.QuartzScheduler' - running locally.
    NOT STARTED.
    Currently in standby mode.
    Number of jobs executed: 0
    Using thread pool 'org.quartz.simpl.SimpleThreadPool' - with 10 threads.
    Using job-store 'org.quartz.simpl.RAMJobStore' - which does not support persistence. and is not clustered.
  
   INFO [2016-01-12 14:37:56,593] ({main} StdSchedulerFactory.java[instantiate]:1339) - Quartz scheduler 'DefaultQuartzScheduler' initi
  alized from default resource file in Quartz package: 'quartz.properties'
   INFO [2016-01-12 14:37:56,593] ({main} StdSchedulerFactory.java[instantiate]:1343) - Quartz scheduler version: 2.2.1
   INFO [2016-01-12 14:37:56,593] ({main} QuartzScheduler.java[start]:575) - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED started.
   INFO [2016-01-12 14:37:56,805] ({main} ServerImpl.java[initDestination]:94) - Setting the server's publish address to be /
   INFO [2016-01-12 14:37:56,888] ({main} WebInfConfiguration.java[unpack]:478) - Extract jar:file:/data/users/huser/zeppelin/zeppelin-
  web-0.5.5-incubating.war!/ to /tmp/jetty-0.0.0.0-8080-zeppelin-web-0.5.5-incubating.war-_-any-/webapp
   INFO [2016-01-12 14:37:57,040] ({main} StandardDescriptorProcessor.java[visitServlet]:284) - NO JSP Support for /, did not find org.
  apache.jasper.servlet.JspServlet
   INFO [2016-01-12 14:37:57,941] ({main} AbstractConnector.java[doStart]:338) - Started SelectChannelConnector@0.0.0.0:8080
   INFO [2016-01-12 14:37:57,941] ({main} ZeppelinServer.java[main]:108) - Started zeppelin server
  </code></pre>
  
  <p>I searched and found that port+1 is the websocket port. However, it's not listening:</p>
  
  <h1>netstat -na | grep 8080</h1>
  
  <p>tcp        0      0 :::8080                     :::*                        LISTEN</p>
  
  <h1>netstat -na | grep 8081</h1>
  
  <p>noting...</p>
  
  <p>And the web return the error:</p>
  
  <p><strong>WebSocket connection to 'ws://ip:8080/ws' failed: Establishing a tunnel via proxy server failed.</strong></p>
  
  <p>Can anyone help?
  Thanks.</p>