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java.lang.NullPointerException: null at org.springframework.web.socket.messaging.StompSubProtocolHandler.handleMessageFromClient(StompSubProtocolHandler.java:127)[spring-websocket-4.0.0.RELEASE.jar:4.0.0.RELEASE] at org.springframework.web.socket.messaging.SubProtocolWebSocketHandler.handleMessage(SubProtocolWebSocketHandler.java:233)[spring-websocket-4.0.0.RELEASE.jar:4.0.0.RELEASE] at org.springframework.web.socket.handler.WebSocketHandlerDecorator.handleMessage(WebSocketHandlerDecorator.java:59)[spring-websocket-4.0.0.RELEASE.jar:4.0.0.RELEASE] at org.springframework.web.socket.handler.LoggingWebSocketHandlerDecorator.handleMessage(LoggingWebSocketHandlerDecorator.java:55)[spring-websocket-4.0.0.RELEASE.jar:4.0.0.RELEASE] at org.springframework.web.socket.handler.ExceptionWebSocketHandlerDecorator.handleMessage(ExceptionWebSocketHandlerDecorator.java:69)[spring-websocket-4.0.0.RELEASE.jar:4.0.0.RELEASE] at org.springframework.web.socket.adapter.jetty.JettyWebSocketHandlerAdapter.onWebSocketText(JettyWebSocketHandlerAdapter.java:77)[spring-websocket-4.0.0.RELEASE.jar:4.0.0.RELEASE] at sun.reflect.GeneratedMethodAccessor52.invoke(Unknown Source)[na:na] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[na:1.7.0_45] at java.lang.reflect.Method.invoke(Method.java:606)[na:1.7.0_45] at org.eclipse.jetty.websocket.common.events.annotated.CallableMethod.call(CallableMethod.java:71)[websocket-common-9.1.0.v20131115.jar:9.1.0.v20131115] at org.eclipse.jetty.websocket.common.events.annotated.OptionalSessionCallableMethod.call(OptionalSessionCallableMethod.java:72)[websocket-common-9.1.0.v20131115.jar:9.1.0.v20131115]