Felix+Jetty 一直出异常，部署不上webapp

[结贴是美德]

刚刚参照Jetty官方手册，将其放到Felix中，然后弄了一个空web应用jar放进去了。
结果不知为何报这个异常：

2014-09-17 22:24:49.501:WARN:oejobis.JettyServerServiceTracker:FelixStartLevel:
java.lang.NullPointerException
        at java.util.regex.Matcher.getTextLength(Matcher.java:1283)
        at java.util.regex.Matcher.reset(Matcher.java:309)
        at java.util.regex.Matcher.<init>(Matcher.java:229)
        at java.util.regex.Pattern.matcher(Pattern.java:1093)
        at org.eclipse.jetty.osgi.boot.jasper.ContainerTldBundleDiscoverer.getUrlsForBundlesWithTlds(ContainerTldBundleDiscoverer.java:139)
        at org.eclipse.jetty.osgi.boot.internal.serverfactory.ServerInstanceWrapper.start(ServerInstanceWrapper.java:290)
        at org.eclipse.jetty.osgi.boot.internal.serverfactory.JettyServerServiceTracker.serviceChanged(JettyServerServiceTracker.java:116)
        at org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:943)
        at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:794)
        at org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:544)
        at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4445)
        at org.apache.felix.framework.Felix.registerService(Felix.java:3431)
        at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:346)
        at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:320)
        at org.eclipse.jetty.osgi.boot.internal.serverfactory.DefaultJettyAtJettyHomeHelper.startJettyAtJettyHome(DefaultJettyAtJettyHomeHelper.java:1
76)
        at org.eclipse.jetty.osgi.boot.JettyBootstrapActivator.start(JettyBootstrapActivator.java:98)
        at org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:645)
        at org.apache.felix.framework.Felix.activateBundle(Felix.java:2154)
        at org.apache.felix.framework.Felix.startBundle(Felix.java:2072)
        at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1299)
        at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:304)
        at java.lang.Thread.run(Thread.java:745)
2014-09-17 22:24:49.504:INFO:oejobis.DefaultJettyAtJettyHomeHelper:FelixStartLevel: Default jetty server configured

不部署web应用是没有异常的，应该是这个web应用有问题。