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java.lang.NullPointerException: 	at org.xmlpull.mxp1.MXParser.fillBuf(MXParser.java:3020)	at org.xmlpull.mxp1.MXParser.more(MXParser.java:3046)	at org.xmlpull.mxp1.MXParser.parseStartTag(MXParser.java:1738)	at org.xmlpull.mxp1.MXParser.parseProlog(MXParser.java:1479)	at org.xmlpull.mxp1.MXParser.nextImpl(MXParser.java:1395)	at org.xmlpull.mxp1.MXParser.next(MXParser.java:1093)	at com.thoughtworks.xstream.io.xml.XppReader.pullNextEvent(XppReader.java:63)	at com.thoughtworks.xstream.io.xml.AbstractPullReader.readRealEvent(AbstractPullReader.java:137)	at com.thoughtworks.xstream.io.xml.AbstractPullReader.readEvent(AbstractPullReader.java:130)	at com.thoughtworks.xstream.io.xml.AbstractPullReader.move(AbstractPullReader.java:109)	at com.thoughtworks.xstream.io.xml.AbstractPullReader.moveDown(AbstractPullReader.java:94)	at com.thoughtworks.xstream.io.xml.XppReader.(XppReader.java:48)	at com.thoughtworks.xstream.io.xml.XppDriver.createReader(XppDriver.java:44)	at com.thoughtworks.xstream.io.xml.XppDriver.createReader(XppDriver.java:49)	at com.thoughtworks.xstream.XStream.fromXML(XStream.java:861)	at org.sonatype.nexus.proxy.attributes.DefaultAttributeStorage.doGetAttributes(DefaultAttributeStorage.java:300)	at org.sonatype.nexus.proxy.attributes.DefaultAttributeStorage.getAttributes(DefaultAttributeStorage.java:179)	at org.sonatype.nexus.proxy.attributes.DefaultAttributesHandler.fetchAttributes(DefaultAttributesHandler.java:138)	at org.sonatype.nexus.proxy.storage.local.fs.DefaultFSLocalRepositoryStorage.retrieveItemFromFile(DefaultFSLocalRepositoryStorage.java:327)	at org.sonatype.nexus.proxy.storage.local.fs.DefaultFSLocalRepositoryStorage.retrieveItem(DefaultFSLocalRepositoryStorage.java:361)	at org.sonatype.nexus.proxy.repository.AbstractRepository.doRetrieveItem(AbstractRepository.java:1213)	at org.sonatype.nexus.proxy.repository.AbstractProxyRepository.doRetrieveItem0(AbstractProxyRepository.java:636)	at org.sonatype.nexus.proxy.repository.AbstractProxyRepository.doRetrieveItem(AbstractProxyRepository.java:617)	at org.sonatype.nexus.proxy.maven.AbstractMavenRepository.doRetrieveItem(AbstractMavenRepository.java:366)	at org.sonatype.nexus.proxy.repository.AbstractRepository.retrieveItem(AbstractRepository.java:725)	at org.sonatype.nexus.proxy.repository.AbstractGroupRepository.doRetrieveItems(AbstractGroupRepository.java:344)	at org.sonatype.nexus.proxy.maven.maven2.M2GroupRepository.doRetrieveMetadata(M2GroupRepository.java:161)	at org.sonatype.nexus.proxy.maven.maven2.M2GroupRepository.doRetrieveItem(M2GroupRepository.java:124)	at org.sonatype.nexus.proxy.repository.AbstractRepository.retrieveItem(AbstractRepository.java:725)	at org.sonatype.nexus.proxy.repository.AbstractRepository.retrieveItem(AbstractRepository.java:532)	at org.sonatype.nexus.proxy.router.DefaultRepositoryRouter.retrieveItem(DefaultRepositoryRouter.java:175)	at org.sonatype.nexus.rest.AbstractResourceStoreContentPlexusResource.get(AbstractResourceStoreContentPlexusResource.java:134)	at org.sonatype.plexus.rest.resource.RestletResource.represent(RestletResource.java:263)	at org.sonatype.nexus.rest.NexusRestletResource.represent(NexusRestletResource.java:34)	at org.restlet.resource.Resource.getRepresentation(Resource.java:302)	at org.restlet.resource.Resource.handleGet(Resource.java:464)	at org.restlet.Finder.handle(Finder.java:353)	at org.restlet.Filter.doHandle(Filter.java:150)	at org.restlet.Filter.handle(Filter.java:195)	at org.restlet.Filter.doHandle(Filter.java:150)	at org.restlet.Filter.handle(Filter.java:195)	at org.restlet.Router.handle(Router.java:504)	at org.restlet.Filter.doHandle(Filter.java:150)	at org.restlet.Filter.handle(Filter.java:195)	at org.restlet.Filter.doHandle(Filter.java:150)	at org.sonatype.plexus.rest.RetargetableRestlet.doHandle(RetargetableRestlet.java:39)	at org.restlet.Filter.handle(Filter.java:195)	at org.restlet.Filter.doHandle(Filter.java:150)	at org.restlet.Filter.handle(Filter.java:195)	at org.restlet.Filter.doHandle(Filter.java:150)	at org.restlet.Filter.handle(Filter.java:195)	at org.restlet.Filter.doHandle(Filter.java:150)	at com.noelios.restlet.StatusFilter.doHandle(StatusFilter.java:130)	at org.restlet.Filter.handle(Filter.java:195)	at org.restlet.Filter.doHandle(Filter.java:150)	at org.restlet.Filter.handle(Filter.java:195)	at com.noelios.restlet.ChainHelper.handle(ChainHelper.java:124)	at com.noelios.restlet.application.ApplicationHelper.handle(ApplicationHelper.java:112)	at org.restlet.Application.handle(Application.java:341)	at org.restlet.ext.wadl.WadlApplication.handle(WadlApplication.java:705)	at org.restlet.Filter.doHandle(Filter.java:150)	at org.restlet.Filter.handle(Filter.java:195)	at org.restlet.Router.handle(Router.java:504)	at org.restlet.Filter.doHandle(Filter.java:150)	at org.restlet.Filter.handle(Filter.java:195)	at org.restlet.Router.handle(Router.java:504)	at org.restlet.Filter.doHandle(Filter.java:150)	at org.restlet.Filter.handle(Filter.java:195)	at com.noelios.restlet.ChainHelper.handle(ChainHelper.java:124)	at org.restlet.Component.handle(Component.java:673)	at org.restlet.Server.handle(Server.java:331)	at com.noelios.restlet.ServerHelper.handle(ServerHelper.java:68)	at com.noelios.restlet.http.HttpServerHelper.handle(HttpServerHelper.java:147)	at com.noelios.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:881)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at org.jsecurity.web.servlet.FilterChainWrapper.doFilter(FilterChainWrapper.java:52)	at org.jsecurity.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:105)	at org.jsecurity.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:135)	at org.jsecurity.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:180)	at org.jsecurity.web.servlet.FilterChainWrapper.doFilter(FilterChainWrapper.java:57)	at org.jsecurity.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:105)	at org.jsecurity.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:135)	at org.jsecurity.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:180)	at org.jsecurity.web.servlet.FilterChainWrapper.doFilter(FilterChainWrapper.java:57)	at org.jsecurity.web.servlet.JSecurityFilter.doFilterInternal(JSecurityFilter.java:382)	at org.jsecurity.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:180)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)	at org.mortbay.jetty.Server.handle(Server.java:326)	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)