title: IOException: Size of the state is larger than the maximum permitted memory-backed state
body: <p>I am facing the following IO exception while running a simple wordcount 
  application over apache flink in cluster mode.</p>
  
  <blockquote>
    <p>IOException: Size of the state is larger than the maximum permitted 
    memory-backed state. Size=34521369 , maxSize=5242880 . Consider using a 
    different state backend, like the File System State backend.</p>
  </blockquote>
  
  <p>I have already using filesystem state backend and configured the checkpoint 
  and state backend directories. </p>
  
  <p>How can I fix this issue? </p>