下载的jive论坛，不能发表帖子，出现错误提示如下。谢谢啦，在线等
java.lang.NullPointerException
at   java.io.StringReader. <init> (StringReader.java:33)
at   org.apache.lucene.queryParser.QueryParser.parse(Unknown   Source)
at   org.apache.lucene.queryParser.QueryParser.parse(Unknown   Source)
at   com.jivesoftware.forum.database.DbQuery.executeQuery(DbQuery.java:166)
at   com.jivesoftware.forum.database.DbQuery.results(DbQuery.java:133)
at   com.jivesoftware.forum.QueryProxy.results(QueryProxy.java:87)
at   org.apache.jsp.search_jsp._jspService(search_jsp.java:640)
at   org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:92)
at   javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at   org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:162)
at   org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:240)
at   org.apache.jasper.servlet.JspServlet.service(JspServlet.java:187)
at   javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
at   org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:200)
at   org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:146)
at   org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
at   org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at   org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at   org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at   org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:144)
at   org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at   org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at   org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at   org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2358)
at   org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:133)
at   org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at   org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
at   org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
at   org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
at   org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:594)
at   org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at   org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at   org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:127)
at   org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:596)
at   org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:433)
at   org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:948)
at   org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
at   org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at   org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at   o