[GEA] Spring 적용시에 error

Google App Engine 에 Spring  적용시 spring 라이브러리만 추가하면 아래와 같은 에러코드가 발생한다

"Could not initialize class org.springframework.web.servlet.DispatcherServlet"

Uncaught exception from servlet
java.lang.NoClassDefFoundError: Could not initialize class org.springframework.web.servlet.DispatcherServlet
	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:532)
	at java.lang.Class.newInstance0(Class.java:372)
	at java.lang.Class.newInstance(Class.java:325)
	at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
	at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:428)
	at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
	at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685)
	at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
	at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
	at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
	at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
	at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:191)
	at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:168)
	at 

위에 에러는 의존성 문제로 나온 에러이다.

spring 에는 commons-logging 을 추가시켜주어야 한다. 

그래도 에러가 난다면 commons-logging의 버전을 다른걸로 바꾸어보자..(본인도 다 테스트는 안된상태라..)