title: Unable to run multiple Jobs in apache flink Parallelly
body: <p>1) I have installed Apache Flink in my local machine (Ubuntu 16.04). Developed a java programs, created Jar files and trying to run them as a jobs in Flink web front end. I am able to run the job individually, but couldn't able to run multiple jobs parallel.
  Please let me know if any configuration has to be modified, so that i can run them simultaneously.
  2) Unable to run the flink job which is having multiple tasks (>500 task in a single job) Getting following exceptions:</p>
  
  <pre><code>(a) network.partition.PartitionNotFoundException (org.apache.flink.runtime.io.network.partition.PartitionNotFoundException)
  </code></pre>
  
  <pre><code>(b) rest.handler.taskmanager.TaskManagerDetailsHandler (org.apache.flink.runtime.rest.handler.taskmanager.TaskManagerDetailsHandler  - Implementation error: Unhandled exception)
  </code></pre>
  
  <pre><code>(c) heap memory exception
  </code></pre>
  
  <p>Please let me know how to overcome these and what are the necessary configuration needed to run the job. </p>
  
  <p>Tried to increase memory to 2048.</p>