java.lang.ClassNotFoundException: com.caucho.vfs.Path

Я создал портлет Liferay PHP и в portlet.xml я добавил этот класс:

<portlet-class>com.liferay.util.bridges.php.PHPPortlet</portlet-class> 

Когда я развертываю портлет, я получаю эту ошибку:

 com.liferay.portal.kernel.deploy.hot.HotDeployException: Error registering portlets for nsFileUpload-portletnsFileUpload-portlet at com.liferay.portal.kernel.deploy.hot.BaseHotDeployListener.throwHotDeployException(BaseHotDeployListener.java:46) at com.liferay.portal.deploy.hot.PortletHotDeployListener.invokeDeploy(PortletHotDeployListener.java:127) at com.liferay.portal.deploy.hot.HotDeployImpl.doFireDeployEvent(HotDeployImpl.java:205) at com.liferay.portal.deploy.hot.HotDeployImpl.fireDeployEvent(HotDeployImpl.java:96) at com.liferay.portal.kernel.deploy.hot.HotDeployUtil.fireDeployEvent(HotDeployUtil.java:27) at com.liferay.portal.kernel.servlet.PluginContextListener.fireDeployEvent(PluginContextListener.java:164) at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalInit(PluginContextListener.java:154) at com.liferay.portal.kernel.util.BasePortalLifecycle.portalInit(BasePortalLifecycle.java:44) at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:64) at com.liferay.portal.kernel.util.PortalLifecycleUtil.register(PortalLifecycleUtil.java:56) at com.liferay.portal.kernel.util.BasePortalLifecycle.registerPortalLifecycle(BasePortalLifecycle.java:54) at com.liferay.portal.kernel.servlet.PluginContextListener.contextInitialized(PluginContextListener.java:116) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1113) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1671) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Caused by: java.lang.NoClassDefFoundError: com/caucho/vfs/Path at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389) at java.lang.Class.getConstructor0(Class.java:2699) at java.lang.Class.newInstance0(Class.java:326) at java.lang.Class.newInstance(Class.java:308) at com.liferay.portlet.PortletBagFactory.getPortletInstance(PortletBagFactory.java:418) at com.liferay.portlet.PortletBagFactory.create(PortletBagFactory.java:121) at com.liferay.portal.deploy.hot.PortletHotDeployListener.doInvokeDeploy(PortletHotDeployListener.java:369) at com.liferay.portal.deploy.hot.PortletHotDeployListener.invokeDeploy(PortletHotDeployListener.java:124) ... 24 more Caused by: java.lang.ClassNotFoundException: com.caucho.vfs.Path 

Это означает, что не com.caucho.vfs.Path класс com.caucho.vfs.Path который импортируется из ServletContextPath.java ( Source ).

Как я могу решить эту проблему? Мне нужно импортировать этот класс?