javax.servlet.ServletException: java.lang.ClassCastException: org.eclipse.jetty.util.DecoratedObjectFactory cannot be cast to org.eclipse.jetty.util.DecoratedObjectFactory

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    javax.servlet.ServletException: java.lang.ClassNotFoundException: org.eclipse.jetty.websocket.server.WebSocketServerFactory

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    Root Cause Analysis

    1. javax.servlet.ServletException

      java.lang.ClassCastException: org.eclipse.jetty.util.DecoratedObjectFactory cannot be cast to org.eclipse.jetty.util.DecoratedObjectFactory

      at org.eclipse.jetty.websocket.servlet.WebSocketServlet.init()
    2. Jetty
      WebSocketServlet.init
      1. org.eclipse.jetty.websocket.servlet.WebSocketServlet.init(WebSocketServlet.java:142)
      1 frame
    3. JavaServlet
      GenericServlet.init
      1. javax.servlet.GenericServlet.init(GenericServlet.java:244)
      1 frame
    4. Jetty
      SelectChannelEndPoint$2.run
      1. org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:626)
      2. org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:482)
      3. org.eclipse.jetty.servlet.ServletHolder.ensureInstance(ServletHolder.java:774)
      4. org.eclipse.jetty.servlet.ServletHolder.prepare(ServletHolder.java:759)
      5. org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:578)
      6. org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
      7. org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
      8. org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
      9. org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1158)
      10. org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
      11. org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
      12. org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1090)
      13. org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
      14. org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:119)
      15. org.eclipse.jetty.server.Server.handle(Server.java:517)
      16. org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:308)
      17. org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:242)
      18. org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:261)
      19. org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
      20. org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:75)
      20 frames
    5. org.eclipse.jetty
      ExecuteProduceConsume.run
      1. org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:213)
      2. org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:147)
      2 frames
    6. Jetty
      QueuedThreadPool$3.run
      1. org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
      2. org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
      2 frames
    7. Java RT
      Thread.run
      1. java.lang.Thread.run(Unknown Source)
      1 frame