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http://issues.apache.org/bugzilla/show_bug.cgi?id=35243 Summary: Constantly restarting Tomcat because Xerces Parser cannot be instantiated Product: Tomcat 5 Version: 5.5.9 Platform: PC OS/Version: Windows Server 2003 Status: NEW Severity: normal Priority: P2 Component: Catalina AssignedTo: tomcat-dev@jakarta.apache.org ReportedBy: [EMAIL PROTECTED] I have tried Googling, looking at message boards, posting on message boards, etc. and no one seems to know anything about this problem. I'm running Apache Web Server 2.0.54 connected to Tomcat 5.5.9 by the mod_jk2 connector. When I try to access a JSP, I get the error: HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception javax.servlet.ServletException: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl could not be instantiated: java.lang.NullPointerException org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) root cause javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl could not be instantiated: java.lang.NullPointerException javax.xml.parsers.SAXParserFactory.newInstance(Unknown Source) org.apache.taglibs.standard.tlv.JstlBaseTLV.validate(Unknown Source) org.apache.jasper.compiler.TagLibraryInfoImpl.validate(TagLibraryInfoImpl.java: 750) org.apache.jasper.compiler.Validator.validateXmlView(Validator.java:1527) org.apache.jasper.compiler.Validator.validate(Validator.java:1495) org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:157) org.apache.jasper.compiler.Compiler.compile(Compiler.java:286) org.apache.jasper.compiler.Compiler.compile(Compiler.java:267) org.apache.jasper.compiler.Compiler.compile(Compiler.java:255) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs. Apache Tomcat/5.5.9 Stopping and restarting the Tomcat service consistently seems to fix the problem. To say I can consistenty reproduce the error is probably not accurate, but it seems to manifest itself every time I significantly modify a JSP. (i.e. When I modify a JSP, I get the error and have to restart Tomcat.) The following shows up in the localhost.2005.06.06.log file: Jun 6, 2005 8:51:43 AM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet jsp threw exception javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl could not be instantiated: java.lang.NullPointerException at javax.xml.parsers.SAXParserFactory.newInstance(Unknown Source) at org.apache.taglibs.standard.tlv.JstlBaseTLV.validate(JstlBaseTLV.java:152) at org.apache.taglibs.standard.tlv.JstlCoreTLV.validate(JstlCoreTLV.java:96) at org.apache.jasper.compiler.TagLibraryInfoImpl.validate(TagLibraryInfoImpl.java:750) at org.apache.jasper.compiler.Validator.validateXmlView(Validator.java:1527) at org.apache.jasper.compiler.Validator.validate(Validator.java:1495) at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:157) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:286) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:267) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:255) at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:307) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:385) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:748) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:678) at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:871) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Unknown Source) The web.xml file for the application is as follows: <?xml version="1.0" encoding="ISO-8859-1"?> <web-app xmlns="http://java.sun.com/xml/ns/j2ee"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"; version="2.4"> <display-name>Madisonville Community College Online Workshop Quiz Grading Tools</display-name> <description> Servlets and JSPs for evaluating the results of online quizzes at the end of online workshops. </description> <servlet> <servlet-name>QuizGrader</servlet-name> <servlet-class>QuizGraderServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>QuizGrader</servlet-name> <url-pattern>/quizgrader</url-pattern> </servlet-mapping> </web-app> I've posted this on the Java Developer forum twice and on HTMLforums.com once and have received no replies. -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
