title: IOException: Filesystem closed exception when running oozie workflow
body: <p>We are running a workflow in oozie.
  It contains two actions: the first is a map reduce job that generates files in the hdfs and the second is a job that should copy the data in the files to a database.</p>
  
  <p>Both parts are done successfully but oozie throws an exception at the end that marks it as a failed process.</p>
  
  <p>This is the exception:</p>
  
  <pre><code>2014-05-20 17:29:32,242 ERROR org.apache.hadoop.security.UserGroupInformation:   PriviledgedActionException as:lpinsight (auth:SIMPLE) cause:java.io.IOException: Filesystem   closed
  2014-05-20 17:29:32,243 WARN org.apache.hadoop.mapred.Child: Error running child
  java.io.IOException: Filesystem closed
      at org.apache.hadoop.hdfs.DFSClient.checkOpen(DFSClient.java:565)
      at org.apache.hadoop.hdfs.DFSInputStream.close(DFSInputStream.java:589)
      at java.io.FilterInputStream.close(FilterInputStream.java:155)
      at org.apache.hadoop.util.LineReader.close(LineReader.java:149)
      at org.apache.hadoop.mapred.LineRecordReader.close(LineRecordReader.java:243)
      at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.close(MapTask.java:222)
      at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:421)
      at org.apache.hadoop.mapred.MapTask.run(MapTask.java:332)
      at org.apache.hadoop.mapred.Child$4.run(Child.java:268)
      at java.security.AccessController.doPrivileged(Native Method)
      at javax.security.auth.Subject.doAs(Subject.java:396)
      at   org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408)
      at org.apache.hadoop.mapred.Child.main(Child.java:262)
  </code></pre>
  
  <p>2014-05-20 17:29:32,256 INFO org.apache.hadoop.mapred.Task: Runnning cleanup for the task</p>
  
  <p>Any idea ?</p>