在Livenay6.2中获得“Portlet Portlet_WAR_portletID has a null portlet bag”

Question

我创建了一个liferay plugin portlet项目，并部署在Liferay6.2中。当我尝试部署时，我收到“Portlet Portlet_WAR_portletID has a null portlet bag”错误。我不能找到根，因为我可以看到我是指正确的插件项目。

SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
    at com.liferay.portlet.PortletContextFactory._create(PortletContextFactory.java:84)
    at com.liferay.portlet.PortletContextFactory.create(PortletContextFactory.java:40)
    at com.liferay.portlet.PortletConfigFactoryImpl.create(PortletConfigFactoryImpl.java:56)
    at com.liferay.portlet.PortletConfigFactoryUtil.create(PortletConfigFactoryUtil.java:32)
    at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(render_005fportlet_jsp.java:606)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at com.liferay.portal.servlet.DirectRequestDispatcher.include(DirectRequestDispatcher.java:57)
    at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.doDispatch(ClassLoaderRequestDispatcherWrapper.java:78)
    at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.include(ClassLoaderRequestDispatcherWrapper.java:53)
    at com.liferay.portlet.PortletContainerImpl._doRender(PortletContainerImpl.java:655)
    at com.liferay.portlet.PortletContainerImpl.render(PortletContainerImpl.java:138)
    at com.liferay.portlet.SecurityPortletContainerWrapper.render(SecurityPortletContainerWrapper.java:141)
    at com.liferay.portlet.RestrictPortletContainerWrapper.render(RestrictPortletContainerWrapper.java:126)
    at com.liferay.portal.kernel.portlet.PortletContainerUtil.render(PortletContainerUtil.java:156)
    at com.liferay.portal.layoutconfiguration.util.PortletRenderer._render(PortletRenderer.java:120)
    at com.liferay.portal.layoutconfiguration.util.PortletRenderer.access$4(PortletRenderer.java:107)
    at com.liferay.portal.layoutconfiguration.util.PortletRenderer$PortletRendererCallable.doCall(PortletRenderer.java:174)
    at com.liferay.portal.layoutconfiguration.util.PortletRenderer$PortletRendererCallable.doCall(PortletRenderer.java:1)
    at com.liferay.portal.kernel.executor.CopyThreadLocalCallable.call(CopyThreadLocalCallable.java:69)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask._runTask(ThreadPoolExecutor.java:682)
    at com.liferay.portal.kernel.concurrent.ThreadPoolExecutor$WorkerTask.run(ThreadPoolExecutor.java:593)
    at java.lang.Thread.run(Unknown Source)

Answer 1

再次重新部署portlet。我也面临着同样的问题。我停止服务器，然后清理portlet，然后启动服务器。当我签入浏览器，然后我得到了内部服务器和控制台“portlet包含一个空的包”。我又部署了一次，它来的很完美。

Answer 2

这个问题最常见的解决方案是从tomcat中取消部署portlet，然后重新部署它。