javax.websocket.DeploymentException: The HTTP response from the server [HTTP/1.1 500 Internal Server Error ] did not permit the HTTP upgrade to WebSocket

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    Root Cause Analysis

    1. javax.websocket.DeploymentException

      The HTTP response from the server [HTTP/1.1 500 Internal Server Error ] did not permit the HTTP upgrade to WebSocket

      at org.apache.tomcat.websocket.WsWebSocketContainer.parseStatus()
    2. Tomcat WS
      WsWebSocketContainer.connectToServer
      1. org.apache.tomcat.websocket.WsWebSocketContainer.parseStatus(WsWebSocketContainer.java:601)
      2. org.apache.tomcat.websocket.WsWebSocketContainer.processResponse(WsWebSocketContainer.java:585)
      3. org.apache.tomcat.websocket.WsWebSocketContainer.connectToServer(WsWebSocketContainer.java:317)
      4. org.apache.tomcat.websocket.WsWebSocketContainer.connectToServer(WsWebSocketContainer.java:183)
      5. org.apache.tomcat.websocket.WsWebSocketContainer.connectToServer(WsWebSocketContainer.java:204)
      5 frames
    3. com.systemincloud.api
      Client.main
      1. com.systemincloud.api.machine.java.Client.main(Client.java:49)
      1 frame