I'm running the final release of NB 6.1 and using Sun AppServer 9.1_02 and this just happened to me. Similarly, I modified a single line of Java source code in a page backing bean, and began to get these deployment errors.
It appears the following was added to my web.xml:
<servlet>
<servlet-name>ServletAdaptor</servlet-name>
<servlet-class>com.sun.ws.rest.impl.container.servlet.ServletAdaptor</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
and
<servlet-mapping>
<servlet-name>ServletAdaptor</servlet-name>
<url-pattern>/resources/*</url-pattern>
</servlet-mapping>
I would consider this to be a serious bug that still exists
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