No suitable default RequestUpgradeStrategy found

Caused by: java.lang.IllegalStateException: No suitable default RequestUpgradeStrategy found
	at org.springframework.web.socket.server.support.AbstractHandshakeHandler.initRequestUpgradeStrategy(AbstractHandshakeHandler.java:145)
	at org.springframework.web.socket.server.support.AbstractHandshakeHandler.<init>(AbstractHandshakeHandler.java:111)
	at org.springframework.web.socket.server.support.DefaultHandshakeHandler.<init>(DefaultHandshakeHandler.java:35)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
	... 55 common frames omitted

信息表明,在Spring WebSocket进行构造服务端信息处理器时，会初始化websocket服务请求策略 ，Spring已经全面内置了其所允许的策略

/**
         package org.springframework.web.socket.server.support;

         AbstractHandshakeHandler * Default constructor that auto-detects and instantiates a
	 * {@link RequestUpgradeStrategy} suitable for the runtime container.
	 * @throws IllegalStateException if no {@link RequestUpgradeStrategy} can be found.
	 */
	protected AbstractHandshakeHandler() {
		this(initRequestUpgradeStrategy());
	}

//initRequestUpgradeStrategy()代码

private static RequestUpgradeStrategy initRequestUpgradeStrategy() {
		String className;
		if (tomcatWsPresent) {
			className = "org.springframework.web.socket.server.standard.TomcatRequestUpgradeStrategy";
		}
		else if (jettyWsPresent) {
			className = "org.springframework.web.socket.server.jetty.JettyRequestUpgradeStrategy";
		}
		else if (undertowWsPresent) {
			className = "org.springframework.web.socket.server.standard.UndertowRequestUpgradeStrategy";
		}
		else if (glassfishWsPresent) {
			className = "org.springframework.web.socket.server.standard.GlassFishRequestUpgradeStrategy";
		}
		else if (weblogicWsPresent) {
			className = "org.springframework.web.socket.server.standard.WebLogicRequestUpgradeStrategy";
		}
		else if (websphereWsPresent) {
			className = "org.springframework.web.socket.server.standard.WebSphereRequestUpgradeStrategy";
		}
		else {
			throw new IllegalStateException("No suitable default RequestUpgradeStrategy found");
		}

		try {
			Class<?> clazz = ClassUtils.forName(className, classLoader);
			return (RequestUpgradeStrategy) clazz.newInstance();
		}
		catch (Throwable ex) {
			throw new IllegalStateException(
					"Failed to instantiate RequestUpgradeStrategy: " + className, ex);
		}
	}

private static final ClassLoader classLoader = AbstractHandshakeHandler.class.getClassLoader();

	private static final boolean jettyWsPresent = ClassUtils.isPresent(
			"org.eclipse.jetty.websocket.server.WebSocketServerFactory", classLoader);

	private static final boolean tomcatWsPresent = ClassUtils.isPresent(
			"org.apache.tomcat.websocket.server.WsHttpUpgradeHandler", classLoader);

	private static final boolean undertowWsPresent = ClassUtils.isPresent(
			"io.undertow.websockets.jsr.ServerWebSocketContainer", classLoader);

	private static final boolean glassfishWsPresent = ClassUtils.isPresent(
			"org.glassfish.tyrus.servlet.TyrusHttpUpgradeHandler", classLoader);

	private static final boolean weblogicWsPresent = ClassUtils.isPresent(
			"weblogic.websocket.tyrus.TyrusServletWriter", classLoader);

	private static final boolean websphereWsPresent = ClassUtils.isPresent(
			"com.ibm.websphere.wsoc.WsWsocServerContainer", classLoader); 

public static boolean isPresent(String className, ClassLoader classLoader) {
		try {
			forName(className, classLoader);
			return true;
		}
		catch (Throwable ex) {
			// Class or one of its dependencies is not present...
			return false;
		}
	}

因此在未找到默认的服务策略时，会抛出 

throw new IllegalStateException("No suitable default RequestUpgradeStrategy found");

本人出现问题的原因是，Tomcat应用服务器版本过低，升级版本后，fixed