title: Illegal reflective access by org.apache.flink.api.java.ClosureCleaner
body: <p>When I run a <strong>SocketWindowWordCount</strong> Program in Apache flink, it shows a </p>
  
  <p><strong>WARNING: Illegal reflective access by org.apache.flink.api.java.ClosureCleaner</strong> </p>
  
  <blockquote>
    <p>WARNING: An illegal reflective access operation has occurred WARNING:
    Illegal reflective access by org.apache.flink.api.java.ClosureCleaner
    (file:/home/aman.srivastava/Downloads/flink-1.10.0/lib/flink-dist_2.11-1.10.0.jar) to field java.lang.String.value WARNING: Please consider reporting
    this to the maintainers of org.apache.flink.api.java.ClosureCleaner WARNING: Use --illegal-access=warn to enable
    warnings of further illegal reflective access operations WARNING: All illegal access operations will be
    denied in a future release Job has been submitted with JobID
    a4badaa76080e47e82a322a4e2060e45</p>
  </blockquote>