title: Error on running multiple Workflow in OOZIE-4.1.0
body: <p>I installed <strong>oozie 4.1.0</strong> on a Linux machine by following the steps at
  <a href="http://gauravkohli.com/2014/08/26/apache-oozie-installation-on-hadoop-2-4-1/" rel="noreferrer">http://gauravkohli.com/2014/08/26/apache-oozie-installation-on-hadoop-2-4-1/</a></p>
  <pre><code>hadoop version - 2.6.0 
  maven - 3.0.4 
  pig - 0.12.0
  </code></pre>
  <p><strong>Cluster Setup -</strong></p>
  <p><strong>MASTER NODE runnig</strong> - Namenode, Resourcemanager ,proxyserver.</p>
  <p><strong>SLAVE NODE running</strong> -Datanode,Nodemanager.</p>
  <p>When I run single workflow job means it succeeds.
  But when I try to run more than one Workflow job i.e. both the jobs are in accepted state
  <img src="https://i.stack.imgur.com/lNGXN.png" alt="enter image description here" /></p>
  <p>Inspecting the error log, I drill down the problem as,</p>
  <pre><code>014-12-24 21:00:36,758 [JobControl] INFO  org.apache.hadoop.ipc.Client  - Retrying connect to server: 172.16.***.***/172.16.***.***:8032. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
  2014-12-25 09:30:39,145 [communication thread] INFO  org.apache.hadoop.ipc.Client  - Retrying connect to server: 172.16.***.***/172.16.***.***:52406. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
  2014-12-25 09:30:39,199 [communication thread] INFO  org.apache.hadoop.mapred.Task  - Communication exception: java.io.IOException: Failed on local exception: java.net.SocketException: Network is unreachable: no further information; Host Details : local host is: &quot;SystemName/127.0.0.1&quot;; destination host is: &quot;172.16.***.***&quot;:52406; 
   at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:764)
   at org.apache.hadoop.ipc.Client.call(Client.java:1415)
   at org.apache.hadoop.ipc.Client.call(Client.java:1364)
   at org.apache.hadoop.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:231)
   at $Proxy9.ping(Unknown Source)
   at org.apache.hadoop.mapred.Task$TaskReporter.run(Task.java:742)
   at java.lang.Thread.run(Thread.java:722)
  Caused by: java.net.SocketException: Network is unreachable: no further information
   at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
   at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:701)
   at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
   at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:529)
   at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:493)
   at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:606)
   at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:700)
   at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:367)
   at org.apache.hadoop.ipc.Client.getConnection(Client.java:1463)
   at org.apache.hadoop.ipc.Client.call(Client.java:1382)
   ... 5 more
  
  Heart beat
  Heart beat
  .
  .
  </code></pre>
  <p>In the above running jobs, if I kill any one launcher job manually <code>(hadoop job -kill &lt;launcher-job-id&gt;)</code> mean all jobs get succeeded. So I think the problem is <strong>more than one launcher job running simultaneously mean job will meet deadlock</strong>..</p>
  <p>If anyone know the reason and solution for above problem. Please do me the favor as soon as possible.</p>