找到本地maven库repository\org\eclipse\jetty\jetty-webapp\8.1.1.v20120215\jetty-webapp-8.1.1.v20120215.jar,修改org\eclipse\jetty\jetty-webapp目录中webdefault.xml文件中useFileMappedBuffer的值为false
<init-param>
<param-name>useFileMappedBuffer</param-name>
<param-value>false</param-value>
</init-param>