nullpointerexception on portlet deployment

我的问题si非常清晰，因为我复制并粘贴了一个在liferay（测试portlet）中工作的项目，我在需要的各种文件中重命名该portlet，并试图部署它。它抛出一个空指针，我真的不明白为什么。下面是错误：nullpointerexception on portlet deployment

GRAVE: Exception sending context destroyed event to listener instance of class com.liferay.portal.kernel.servlet.SecurePluginContextListener 
java.lang.ExceptionInInitializerError 
    at com.liferay.portal.kernel.deploy.hot.HotDeployEvent.initDependentServletContextNames(HotDeployEvent.java:97) 
    at com.liferay.portal.kernel.deploy.hot.HotDeployEvent.<init>(HotDeployEvent.java:53) 
    at com.liferay.portal.kernel.servlet.PluginContextListener.fireUndeployEvent(PluginContextListener.java:170) 
    at com.liferay.portal.kernel.servlet.SecurePluginContextListener.fireUndeployEvent(SecurePluginContextListener.java:294) 
    at com.liferay.portal.kernel.servlet.PluginContextListener.doPortalDestroy(PluginContextListener.java:132) 
    at com.liferay.portal.kernel.util.BasePortalLifecycle.portalDestroy(BasePortalLifecycle.java:31) 
    at com.liferay.portal.kernel.servlet.PluginContextListener.contextDestroyed(PluginContextListener.java:97) 
    at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:5063) 
    at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5723) 
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) 
    at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:1028) 
    at org.apache.catalina.startup.HostConfig.undeploy(HostConfig.java:1547) 
    at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1453) 
    at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1695) 
    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:333) 
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117) 
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90) 
    at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1374) 
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1546) 
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1556) 
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1524) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: java.lang.NullPointerException 
    at com.liferay.portal.kernel.util.PropsUtil.get(PropsUtil.java:32) 
    at com.liferay.portal.kernel.deploy.hot.DependencyManagementThreadLocal.<clinit>(DependencyManagementThreadLocal.java:40) 
    ... 22 more

我通过liferay的tomcat的部署目录进行部署。

这不是一个关于nullpointer异常的问题，而是Liferay中portlet部署的问题。

来源

2016-06-21 softwareplay

可能重复[什么是NullPointerException，以及如何解决它？]（http://stackoverflow.com/questions/218384/what-is-a-nullpointerexception-and-how-doi-i-fix - 我） – Sanjeev

我知道什么是空指针，我只是不明白为什么它在这种情况下抛出...... – softwareplay

因此，你需要去'PropsUtil.java'，看看有什么是'32行'那是造成NPE – Sanjeev

自您重命名Portlet文件以来，很可能是Portlet配置问题。您能不能给我们的portlet.xml和的Liferay-portlet.xml中的内容吗？

来源

2016-06-28 14:20:37

nullpointerexception on portlet deployment

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