Exception Error when I try to initialize hudson.war

Question

Hi there, I have installed hudson on Ubuntu server and then run java -jar hudson.war, giving me this exception error message:

Status Code: 500 Exception: The error below occurred during context initialisation, so no further requests can be processed:

java.lang.ExceptionInInitializerError at java.lang.Class.initializeClass(libgcj.so.10) at hudson.WebAppMain.installLogger(WebAppMain.java:257) at hudson.WebAppMain.contextInitialized(WebAppMain.java:112) at winstone.WebAppConfiguration.(WebAppConfiguration.java:889) at winstone.HostConfiguration.initWebApp(HostConfiguration.java:131) at winstone.HostConfiguration.(HostConfiguration.java:73) at winstone.HostGroup.initHost(HostGroup.java:85) at winstone.HostGroup.(HostGroup.java:45) at winstone.Launcher.(Launcher.java:196) at winstone.Launcher.main(Launcher.java:391) at java.lang.reflect.Method.invoke(libgcj.so.10) at Main.main(Main.java:200) Caused by: com.thoughtworks.xstream.XStream$InitializationException: Could not instantiate converter : com.thoughtworks.xstream.converters.extended.DurationConverter : null at com.thoughtworks.xstream.XStream.dynamicallyRegisterConverter(XStream.java:735) at com.thoughtworks.xstream.XStream.setupConverters(XStream.java:699) at com.thoughtworks.xstream.XStream.(XStream.java:445) at com.thoughtworks.xstream.XStream.(XStream.java:385) at com.thoughtworks.xstream.XStream.(XStream.java:323) at hudson.util.XStream2.(XStream2.java:61) at hudson.model.Hudson.(Hudson.java:3571) at java.lang.Class.initializeClass(libgcj.so.10) ...11 more Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Constructor.newInstance(libgcj.so.10) at com.thoughtworks.xstream.XStream.dynamicallyRegisterConverter(XStream.java:728) ...18 more Caused by: javax.xml.datatype.DatatypeConfigurationException: java.lang.ClassNotFoundException: gnu.xml.datatype.JAXPDatatypeFactory
at javax.xml.datatype.DatatypeFactory.newInstance(libgcj.so.10) at com.thoughtworks.xstream.converters.extended.DurationConverter.(DurationConverter.java:33) at java.lang.reflect.Constructor.newInstance(libgcj.so.10) ...19 more Caused by: java.lang.ClassNotFoundException: gnu.xml.datatype.JAXPDatatypeFactory
at java.lang.Class.forName(libgcj.so.10) at javax.xml.datatype.DatatypeFactory.newInstance(libgcj.so.10) ...21 more

Stacktrace:

java.lang.ExceptionInInitializerError at java.lang.Class.initializeClass(libgcj.so.10) at hudson.WebAppMain.installLogger(WebAppMain.java:257) at hudson.WebAppMain.contextInitialized(WebAppMain.java:112) at winstone.WebAppConfiguration.(WebAppConfiguration.java:889) at winstone.HostConfiguration.initWebApp(HostConfiguration.java:131) at winstone.HostConfiguration.(HostConfiguration.java:73) at winstone.HostGroup.initHost(HostGroup.java:85) at winstone.HostGroup.(HostGroup.java:45) at winstone.Launcher.(Launcher.java:196) at winstone.Launcher.main(Launcher.java:391) at java.lang.reflect.Method.invoke(libgcj.so.10) at Main.main(Main.java:200) Caused by: com.thoughtworks.xstream.XStream$InitializationException: Could not instantiate converter : com.thoughtworks.xstream.converters.extended.DurationConverter : null at com.thoughtworks.xstream.XStream.dynamicallyRegisterConverter(XStream.java:735) at com.thoughtworks.xstream.XStream.setupConverters(XStream.java:699) at com.thoughtworks.xstream.XStream.(XStream.java:445) at com.thoughtworks.xstream.XStream.(XStream.java:385) at com.thoughtworks.xstream.XStream.(XStream.java:323) at hudson.util.XStream2.(XStream2.java:61) at hudson.model.Hudson.(Hudson.java:3571) at java.lang.Class.initializeClass(libgcj.so.10) ...11 more Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Constructor.newInstance(libgcj.so.10) at com.thoughtworks.xstream.XStream.dynamicallyRegisterConverter(XStream.java:728) ...18 more Caused by: javax.xml.datatype.DatatypeConfigurationException: java.lang.ClassNotFoundException: gnu.xml.datatype.JAXPDatatypeFactory
at javax.xml.datatype.DatatypeFactory.newInstance(libgcj.so.10) at com.thoughtworks.xstream.converters.extended.DurationConverter.(DurationConverter.java:33) at java.lang.reflect.Constructor.newInstance(libgcj.so.10) ...19 more Caused by: java.lang.ClassNotFoundException: gnu.xml.datatype.JAXPDatatypeFactory
at java.lang.Class.forName(libgcj.so.10) at javax.xml.datatype.DatatypeFactory.newInstance(libgcj.so.10) ...21 more

Generated by Winstone Servlet Engine v0.9.10 at Mon Oct 25 14:55:59 PDT 20102010

Do you know what I am missing? any suggestions would be very appreciated.

regards Naoya