title: no tasktracker to stop, no namenode to stop localhost:, no datanode to stop localhost
body: <p>I am trying to install hadoop on ubuntu using <a href="http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/" rel="nofollow noreferrer">this</a> tutorial</p>
  <p>I have changed all the conf files and tried every solution available on the internet.
  I dont get any error when i run <code>start-all.sh</code> but when i use jps to check for processes, I get this:-&gt;</p>
  <pre><code>3132 Jps
  2742 SecondaryNameNode
  2830 JobTracker
  </code></pre>
  <p>when I use <code>stop-all.sh</code>, I get:-&gt;</p>
  <pre><code>stopping jobtracker
  localhost: no tasktracker to stop
  no namenode to stop
  localhost: no datanode to stop
  localhost: stopping secondarynamenode
  </code></pre>
  <p>this is my jobtracker log</p>
  <pre><code>Problem connecting to HDFS Namenode... re-trying
  java.net.ConnectException: Call to localhost/127.0.0.1:54310 failed on connection exception: java.net.ConnectException: Connection refused
      at org.apache.hadoop.ipc.Client.wrapException(Client.java:1142)
      at org.apache.hadoop.ipc.Client.call(Client.java:1118)
      at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229)
      at com.sun.proxy.$Proxy7.getProtocolVersion(Unknown Source)
      at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:606)
      at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:85)
  </code></pre>