plz,solve this error

[patel mitesh]

16 Oct, 2011 6:40:22 PM com.google.apphosting.utils.jetty.JettyLogger
info
INFO: Logging to JettyLogger(null) via
com.google.apphosting.utils.jetty.JettyLogger
16 Oct, 2011 6:40:22 PM
com.google.apphosting.utils.config.AppEngineWebXmlReader
readAppEngineWebXml
INFO: Successfully processed F:\mit\war\WEB-INF/appengine-web.xml
16 Oct, 2011 6:40:22 PM
com.google.apphosting.utils.config.AbstractConfigXmlReader
readConfigXml
INFO: Successfully processed F:\mit\war\WEB-INF/web.xml
16 Oct, 2011 6:40:22 PM com.google.apphosting.utils.jetty.JettyLogger
warn
WARNING: failed
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext@e45076{/,F:
\mit\war}: javax.xml.parsers.FactoryConfigurationError: Provider
com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl could not
be instantiated: java.lang.NullPointerException
16 Oct, 2011 6:40:22 PM com.google.apphosting.utils.jetty.JettyLogger
warn
WARNING: failed JettyContainerService$ApiProxyHandler@15e9756:
javax.xml.parsers.FactoryConfigurationError: Provider
com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl could not
be instantiated: java.lang.NullPointerException
16 Oct, 2011 6:40:22 PM com.google.apphosting.utils.jetty.JettyLogger
warn
WARNING: Error starting handlers
javax.xml.parsers.FactoryConfigurationError: Provider
com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl could not
be instantiated: java.lang.NullPointerException
at
javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:
134)
at org.mortbay.xml.XmlParser.<init>(XmlParser.java:69)
at
org.mortbay.jetty.webapp.WebXmlConfiguration.webXmlParser(WebXmlConfiguration.java:
83)
at
org.mortbay.jetty.webapp.WebXmlConfiguration.<init>(WebXmlConfiguration.java:
78)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:
39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:
27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:506)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at
org.mortbay.jetty.webapp.WebAppContext.loadConfigurations(WebAppContext.java:
858)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:
430)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:
186)
at
com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:
182)
at
com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:
172)
at com.google.appengine.tools.development.DevAppServerMain
$StartAction.apply(DevAppServerMain.java:164)
at com.google.appengine.tools.util.Parser
$ParseResult.applyArgs(Parser.java:48)
at
com.google.appengine.tools.development.DevAppServerMain.<init>(DevAppServerMain.java:
113)
at
com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:
89)
16 Oct, 2011 6:40:22 PM com.google.apphosting.utils.jetty.JettyLogger
warn
WARNING: Nested in javax.xml.parsers.FactoryConfigurationError:
Provider com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl
could not be instantiated: java.lang.NullPointerException:
java.lang.NullPointerException
at javax.xml.parsers.FactoryFinder.newInstance(FactoryFinder.java:
103)
at javax.xml.parsers.FactoryFinder.find(FactoryFinder.java:213)
at
javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:
128)
at org.mortbay.xml.XmlParser.<init>(XmlParser.java:69)
at
org.mortbay.jetty.webapp.WebXmlConfiguration.webXmlParser(WebXmlConfiguration.java:
83)
at
org.mortbay.jetty.webapp.WebXmlConfiguration.<init>(WebXmlConfiguration.java:
78)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:
39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:
27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:506)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at
org.mortbay.jetty.webapp.WebAppContext.loadConfigurations(WebAppContext.java:
858)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:
430)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
50)
at
com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:
186)
at
com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:
182)
at
com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:
172)
at com.google.appengine.tools.development.DevAppServerMain
$StartAction.apply(DevAppServerMain.java:164)
at com.google.appengine.tools.util.Parser
$ParseResult.applyArgs(Parser.java:48)
at
com.google.appengine.tools.development.DevAppServerMain.<init>(DevAppServerMain.java:
113)
at
com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:
89)
16 Oct, 2011 6:40:22 PM
com.google.appengine.tools.development.DevAppServerImpl start
INFO: The server is running at http://localhost:8888/



i am getting this error an application does't not run.. plz any one
help me

[Sudhakar Abraham]

This problem usually happens when you have the Xerces classes bundled
along
with your application classes. You don't need to bundle Xerces, since
it is
already provided by the JRE.

S. Abraham
www.DataStoreGwt.com
Persist objects directly in Google App Engine

> INFO: The server is running athttp://localhost:8888/