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在 liferay 门户 6.2 CE-GA2 中，我使用了留言板 portlet。在这个 portlet 中，我创建了一个线程，然后回复该线程。catalina.out每次回复后，我在日志文件中都有这些消息：

 17:18:01,520 ERROR [http-bio-80-exec-575][IncludeTag:129] Current URL /web/knowledge-management/wiki/-/message_boards/message/109006 generates exception: null
    java.lang.NullPointerException
    at org.apache.jsp.html.portlet.message_005fboards.view_005fthread_005fmessage_jsp._jspService(view_005fthread_005fmessage_jsp.java:726)
    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.taglib.util.IncludeTag.include(IncludeTag.java:295)
    at com.liferay.taglib.util.IncludeTag.doInclude(IncludeTag.java:192)
    at com.liferay.taglib.util.IncludeTag.doEndTag(IncludeTag.java:83)
    at org.apache.jsp.html.portlet.message_005fboards.view_005fmessage_005fcontent_jsp._jspx_meth_liferay_002dutil_005finclude_005f0(view_005fmessage_005fcontent_jsp.java:2972)
    at org.apache.jsp.html.portlet.message_005fboards.view_005fmessage_005fcontent_jsp._jspService(view_005fmessage_005fcontent_jsp.java:2322)
    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.taglib.util.IncludeTag.include(IncludeTag.java:295)
    at com.liferay.taglib.util.IncludeTag.doInclude(IncludeTag.java:192)
    at com.liferay.taglib.util.IncludeTag.doEndTag(IncludeTag.java:83)
    at org.apache.jsp.html.portlet.message_005fboards.view_005fmessage_005fdefault_jsp._jspx_meth_liferay_002dutil_005finclude_005f0(view_005fmessage_005fdefault_jsp.java:1997)

我如何解决这个问题？

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1 回答 1

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这取决于您想深入到什么程度：您可以分析 NullpointerException 发生的位置，看看是否存在易于修复的问题。您还可以检查从那时起对门户所做的 issuetracker 和提交，并向后移植在更高版本中所做的任何修复（如果它已经修复）

这引出了我的实际建议：我建议升级到最近发布的 GA6 并检查它是否仍然存在。很可能这个问题已经解决了很久，一个简单的更新可以帮助你摆脱这个消息。如果它是固定的：派对。如果不是：至少您使用的是最新版本，并且可能已经修复了一些安全问题（当然还有一些其他问题）。

于 2016-01-20T13:55:12.227 回答