启动cat的时候出现异常？

Question

通过指令启动cat的时候出现如下的问题：

HTTP ERROR 503

Problem accessing /cat/r. Reason:

org.unidal.lookup.LookupException: Component(org.unidal.web.lifecycle.RequestLifecycle) lookup failure. details: Unable to lookup component 'org.unidal.web.lifecycle.RequestLifecycle', it could not be started.
      role: org.unidal.web.lifecycle.RequestLifecycle
  roleHint: mvc
classRealm: plexus.core
-----------------------------------------------------
realm =    plexus.core
strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
Number of foreign imports: 0

-----------------------------------------------------

Caused by:

javax.servlet.UnavailableException: org.unidal.lookup.LookupException: Component(org.unidal.web.lifecycle.RequestLifecycle) lookup failure. details: Unable to lookup component 'org.unidal.web.lifecycle.RequestLifecycle', it could not be started.
      role: org.unidal.web.lifecycle.RequestLifecycle
  roleHint: mvc
classRealm: plexus.core
-----------------------------------------------------
realm =    plexus.core
strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
Number of foreign imports: 0

-----------------------------------------------------

	at org.mortbay.jetty.servlet.ServletHolder.makeUnavailable(ServletHolder.java:415)
	at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:451)
	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:736)
	at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
	at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282)
	at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518)
	at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499)
	at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6PluginWebAppContext.java:115)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
	at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
	at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
	at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
	at org.mortbay.jetty.Server.doStart(Server.java:224)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
	at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer.java:132)
	at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:454)
	at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:396)
	at org.mortbay.jetty.plugin.AbstractJettyRunMojo.execute(AbstractJettyRunMojo.java:210)
	at org.mortbay.jetty.plugin.Jetty6RunMojo.execute(Jetty6RunMojo.java:184)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
	at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
	at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)
	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)

Answer 1

直接用1.6好用

Answer 2

拉一下最新代码吧。

Answer 3

用jdk7就好了，暂不支持8！