my webdav servlet able to initialize properly. but when i use my browser to 
access webdav http://localhost:8080/repository/default. i get the following 
error. may i know what i miss out?



INFO: Server startup in 29407 ms
24.01.2008 00:29:25 *INFO * AbstractConfig: Configuration of BootstrapConfig 
(AbstractConfig.java, line 101)
24.01.2008 00:29:25 *INFO * AbstractConfig: 
---------------------------------------------- (AbstractConfig.java, line 102)
24.01.2008 00:29:25 *INFO * AbstractConfig:   valid: true (AbstractConfig.java, 
line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   rmiConfig: [EMAIL PROTECTED] 
(AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   repositoryConfig: 
yodude/repository.xml (AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   class: class 
org.apache.jackrabbit.j2ee.BootstrapConfig (AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   repositoryHome: yodude 
(AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   repositoryName: 
jackrabbit.repository (AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   jndiConfig: [EMAIL PROTECTED] 
(AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig: 
---------------------------------------------- (AbstractConfig.java, line 108)
24.01.2008 00:29:25 *INFO * AbstractConfig: Configuration of JNDIConfig 
(AbstractConfig.java, line 101)
24.01.2008 00:29:25 *INFO * AbstractConfig: 
---------------------------------------------- (AbstractConfig.java, line 102)
24.01.2008 00:29:25 *INFO * AbstractConfig:   valid: true (AbstractConfig.java, 
line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   jndiName: jackrabbit.repository 
(AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   jndiEnabled: false 
(AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   class: class 
org.apache.jackrabbit.j2ee.JNDIConfig (AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   jndiEnv: 
{java.naming.provider.url=localhost, 
java.naming.factory.initial=org.apache.jackrabbit.core.jndi.provider.DummyInitialContextFactory}
 (AbstractConf
24.01.2008 00:29:25 *INFO * AbstractConfig: 
---------------------------------------------- (AbstractConfig.java, line 108)
24.01.2008 00:29:25 *INFO * AbstractConfig: Configuration of RMIConfig 
(AbstractConfig.java, line 101)
24.01.2008 00:29:25 *INFO * AbstractConfig: 
---------------------------------------------- (AbstractConfig.java, line 102)
24.01.2008 00:29:25 *INFO * AbstractConfig:   valid: true (AbstractConfig.java, 
line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   rmiName: jackrabbit.repository 
(AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   class: class 
org.apache.jackrabbit.j2ee.RMIConfig (AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   rmiUri: 
//localhost:1099/jackrabbit.repository (AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   rmiPort: 1099 
(AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   rmiEnabled: true 
(AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig:   rmiHost: localhost 
(AbstractConfig.java, line 106)
24.01.2008 00:29:25 *INFO * AbstractConfig: 
---------------------------------------------- (AbstractConfig.java, line 108)
24.01.2008 00:29:25 *INFO * RepositoryAccessServlet:   trying to retrieve 
repository using rmi. uri=//localhost:1099/jackrabbit.repository 
(RepositoryAccessServlet.java, line 217)
24.01.2008 00:29:26 *INFO * RepositoryAccessServlet: Acquired repository via 
RMI. (RepositoryAccessServlet.java, line 232)
24.01.2008 00:29:38 *ERROR* [Webdav]: Servlet.service() for servlet Webdav 
threw exception (StandardWrapperValve.java, line 260)
java.lang.NullPointerException
        at 
org.apache.jackrabbit.webdav.jcr.JcrDavException.<init>(JcrDavException.java:111)
        at 
org.apache.jackrabbit.webdav.simple.DavSessionProviderImpl.attachSession(DavSessionProviderImpl.java:99)
        at 
org.apache.jackrabbit.server.AbstractWebdavServlet.service(AbstractWebdavServlet.java:183)
        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.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at 
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
        at 
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at 
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at 
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:619)
24.01.2008 00:29:38 *ERROR* [Webdav]: Servlet.service() for servlet Webdav 
threw exception (SLF4JLocationAwareLog.java, line 174)
java.lang.NullPointerException
        at 
org.apache.jackrabbit.webdav.jcr.JcrDavException.<init>(JcrDavException.java:111)
        at 
org.apache.jackrabbit.webdav.simple.DavSessionProviderImpl.attachSession(DavSessionProviderImpl.java:99)
        at 
org.apache.jackrabbit.server.AbstractWebdavServlet.service(AbstractWebdavServlet.java:183)
        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.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at 
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
        at 
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at 
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at 
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:619)
24.01.2008 00:31:17 *ERROR* [Webdav]: Servlet.service() for servlet Webdav 
threw exception (StandardWrapperValve.java, line 260)
java.lang.NullPointerException
        at 
org.apache.jackrabbit.webdav.jcr.JcrDavException.<init>(JcrDavException.java:111)
        at 
org.apache.jackrabbit.webdav.simple.DavSessionProviderImpl.attachSession(DavSessionProviderImpl.java:99)
        at 
org.apache.jackrabbit.server.AbstractWebdavServlet.service(AbstractWebdavServlet.java:183)
        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)

       
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