Duplicate config file paths found:配置报错 

在 IntelliJ IDEA 中 配置 Jetty9 出现 Duplicate config file paths found

在 IDEA 中 配置 Jetty9 的时候 会 出现 "Duplicate config file paths found",但是安装 提示 取消 etc\jeety-jmx.xml 之后，虽然不会提示错误了，但是 配置完 之后 也是无法启动 jetty 的，会报错 "Could not find the main class: duplicate.  Program will exit."
这具体是为什么呢？

取消选择 etc\jetty-jxm.xml之后 启动 会报错，而不取消根本无法保存配置

"C:\Program Files\Java\jdk1.6.0_45\bin\java" -DSTOP.PORT=0 -Dcom.sun.management.jmxremote= -Dcom.sun.management.jmxremote.port=1099 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -DOPTIONS=jmx -Didea.launcher.port=7533 "-Didea.launcher.bin.path=D:\CodeProgram\IntelliJ IDEA 11.1.5\bin" duplicate -Dfile.encoding=GBK -classpath "start.jar;D:\CodeProgram\IntelliJ IDEA 11.1.5\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain org.eclipse.jetty.start.Main "C:\Documents and Settings\Administrator\Local Settings\temp\context1942389928663380414config\contexts-config.xml" java.lang.NoClassDefFoundError: duplicate Caused by: java.lang.ClassNotFoundException: duplicate at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) Could not find the main class: duplicate.  Program will exit. [2013-10-18 06:12:50,375] Artifact BaeTest:war exploded: Server is not connected. Press 'Deploy' to start deployment. Exception in thread "main" Disconnected from server