HI, For starters, you should override the init() method with no args, as that's provided for your convenience. It gets call from the one with the ServletConfig arg.
Then, instead of saving a reference to the ServletConfig passed to init, get a new one in your destroy method: in destroy, just have ServletContext sc = getServletConfig().getServletContext(); I hope that helps, Yoav Shapira Millennium ChemInformatics >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] >Sent: Friday, September 13, 2002 7:12 AM >To: Tomcat Users List >Subject: Problem Loading Servlet on Server startup > >Hi, > >below is my current web.xml listed. >As the first Servlet I am loading the InitAppServlet. The init(cfg >ServletConfig) Methode lookes like: > > public void init(ServletConfig cfg) throws ServletException > { > this.cfg = cfg; > this.ctx = cfg.getServletContext(); > //initApp(); > > }//init() > >When I startup the application I get an Exception form the destroy() >methode of the InitAppServlet is thrown. >You can see below the thrown Execption >As a strange thing: it already used to work! > >Does anyone have an idea? > >I am using Tomcat 4.0.1 on a Linux SuSE 7.3 Box, JDK 1.3.1 > >thanks, rainer > >##################################### >Exception: > >Servlet InitAppServlet threw unload() exception >javax.servlet.ServletException: Servlet.destroy() for servlet >InitAppServlet threw exception > at >org.apache.catalina.core.StandardWrapper.unload(StandardWrapper.java:10 20) > at >org.apache.catalina.core.StandardWrapper.stop(StandardWrapper.java:1193 ) > at >org.apache.catalina.core.StandardContext.reload(StandardContext.java:23 81) > at >org.apache.catalina.servlets.ManagerServlet.reload(ManagerServlet.java: 448) > at >org.apache.catalina.servlets.ManagerServlet.doGet(ManagerServlet.java:2 81) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) > at >org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applic atio >nFilterChain.java:247) > at >org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFil terC >hain.java:193) > at >org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperVal ve.j >ava:243) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >566) > at >org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 472) > at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) > at >org.apache.catalina.core.StandardContextValve.invoke(StandardContextVal ve.j >ava:201) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >566) > at >org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authenticato rBas >e.java:518) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >564) > at >org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 472) > at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) > at >org.apache.catalina.core.StandardContext.invoke(StandardContext.java:23 44) > at >org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.jav a:16 >4) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >566) > at >org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherV alve >.java:170) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >564) > at >org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.jav a:17 >0) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >564) > at >org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:46 2) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >564) > at >org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 472) > at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) > at >org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve .jav >a:163) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >566) > at >org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 472) > at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) > at >org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor. java >:1011) > at >org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java :110 >6) > at java.lang.Thread.run(Thread.java:484) >----- Root Cause ----- >java.lang.NullPointerException > at javax.servlet.GenericServlet.getServletContext(GenericServlet.java:205) > at javax.servlet.GenericServlet.log(GenericServlet.java:300) > at javax.servlet.GenericServlet.destroy(GenericServlet.java:122) > at >org.apache.catalina.core.StandardWrapper.unload(StandardWrapper.java:10 11) > at >org.apache.catalina.core.StandardWrapper.stop(StandardWrapper.java:1193 ) > at >org.apache.catalina.core.StandardContext.reload(StandardContext.java:23 81) > at >org.apache.catalina.servlets.ManagerServlet.reload(ManagerServlet.java: 448) > at >org.apache.catalina.servlets.ManagerServlet.doGet(ManagerServlet.java:2 81) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) > at >org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applic atio >nFilterChain.java:247) > at >org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFil terC >hain.java:193) > at >org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperVal ve.j >ava:243) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >566) > at >org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 472) > at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) > at >org.apache.catalina.core.StandardContextValve.invoke(StandardContextVal ve.j >ava:201) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >566) > at >org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authenticato rBas >e.java:518) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >564) > at >org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 472) > at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) > at >org.apache.catalina.core.StandardContext.invoke(StandardContext.java:23 44) > at >org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.jav a:16 >4) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >566) > at >org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherV alve >.java:170) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >564) > at >org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.jav a:17 >0) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >564) > at >org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:46 2) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >564) > at >org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 472) > at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) > at >org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve .jav >a:163) > at >org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.j ava: >566) > at >org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java: 472) > at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) > at >org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor. java >:1011) > at >org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java :110 >6) > at java.lang.Thread.run(Thread.java:484) > >########################################################### > >web.xml: > ><?xml version="1.0" encoding="ISO-8859-1"?> > ><!DOCTYPE web-app > PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" > "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd";> > ><web-app> > > <context-param> > <param-name>mapserver_pfad</param-name> > <param-value>http://jspserver</param-value> > <!-- <param-value>http://development.projektinter.net/</param-value> --> > <description>MapServer-Pfad</description> > </context-param> > <context-param> > <param-name>mapserver_cgi_pfad</param-name> > <param-value>/cgi-bin/mapserv</param-value> > <description>MapServer CGI Pfad</description> > </context-param> > <context-param> > <param-name>apache_pfad</param-name> > <param-value>%2Fusr%2Flocal%2Fhttpd%2Fhtdocs%2F</param-value> > <description>Pfad zum Apache Server unter dem sich das mapserver >Verzichnis befindet</description> > </context-param> > <context-param> > <param-name>tomcat_pfad</param-name> > <param-value>%2Fusr%2Flib%2Fjakarta-tomcat-4.0.1%2F</param-value> > <description>Pfad des Tomcat Wurzelverzeichnis</description> > </context-param> > <context-param> > <param-name>application_name</param-name> > <param-value>wwa-m</param-value> > <description>Name der Application</description> > </context-param> > > <servlet> > <servlet-name>InitAppServlet</servlet-name> > <servlet-class>net.projektinter.wwam.util.InitAppServlet</servlet- >class> > <init-param> > <param-name>fileName</param-name> > <param-value>system.out.println</param-value> > </init-param> > <init-param> > <param-name>logLevel</param-name> > <param-value>debug</param-value> > </init-param> > <init-param> > <param-name>dbUrl</param-name> > <param-value>jdbc:mysql://localhost:3306</param-value> > </init-param> > <init-param> > <param-name>dbName</param-name> > <param-value>wwa_m01</param-value> > </init-param> > <init-param> > <param-name>dbDriver</param-name> > <param-value>org.gjt.mm.mysql.Driver</param-value> > </init-param> > <init-param> > <param-name>dbPassword</param-name> > <param-value></param-value> > </init-param> > <init-param> > <param-name>dbUser</param-name> > <param-value>root</param-value> > </init-param> > <load-on-startup>1</load-on-startup> > </servlet> > > > <!-- Standard Action Servlet Configuration (with debugging) --> > <servlet> > <servlet-name>action</servlet-name> > <servlet-class>PIActionServlet</servlet-class> > <init-param> > <param-name>application</param-name> > <param-value>ApplicationResources</param-value> > </init-param> > <init-param> > <param-name>config</param-name> > <param-value>/WEB-INF/struts-config.xml</param-value> > </init-param> > <init-param> > <param-name>debug</param-name> > <param-value>2</param-value> > </init-param> > <init-param> > <param-name>detail</param-name> > <param-value>1</param-value> > </init-param> > <init-param> > <param-name>validate</param-name> > <param-value>true</param-value> > </init-param> > <load-on-startup>2</load-on-startup> > </servlet> > > <!-- Standard Action Servlet Mapping --> > <servlet-mapping> > <servlet-name>action</servlet-name> > <url-pattern>/app/*</url-pattern> > </servlet-mapping> > > > <!-- Struts Tag Library Descriptors --> > <taglib> > <taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri> > <taglib-location>/WEB-INF/struts-bean.tld</taglib-location> > </taglib> > > <taglib> > <taglib-uri>/WEB-INF/struts-html.tld</taglib-uri> > <taglib-location>/WEB-INF/struts-html.tld</taglib-location> > </taglib> > > <taglib> > <taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri> > <taglib-location>/WEB-INF/struts-logic.tld</taglib-location> > </taglib> > > <taglib> > <taglib-uri>/WEB-INF/struts-form.tld</taglib-uri> > <taglib-location>/WEB-INF/struts-form.tld</taglib-location> > </taglib> > > <taglib> > <taglib-uri>/WEB-INF/struts.tld</taglib-uri> > <taglib-location>/WEB-INF/struts.tld</taglib-location> > </taglib> > > <taglib> > <taglib-uri>/WEB-INF/logon.tld</taglib-uri> > <taglib-location>/WEB-INF/logon.tld</taglib-location> > </taglib> > <resource-ref> > <description> > Resource reference to a factory for java.sql.Connection > instances that may be used for talking to a particular > database that is configured in the server.xml file. > </description> > <res-ref-name>jdbc/wwa-mDB</res-ref-name> > <res-type>javax.sql.DataSource</res-type> > <res-auth>Container</res-auth> ></resource-ref> > ></web-app>
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