GeoServer WMS crashes -

i'm using winxp (sp3), geosever 2.3.0 jre 1.6 , trying layer displayed wms. using layer preview feature of geoserver admin web interface (geoserver/web), causes geoserver throw exception of wms formats. fresh install of geoserver. have tried jre 1.7 no change in behavior. insight appreciated.

request: getmap         filters = null         palette = null         tiled = false         srs = epsg:26713         featureversion = null         styles = [styleimpl[ name=capitals]]         layers = [org.geoserver.wms.maplayerinfo@6f893642]         maxfeatures = null         bbox = referencedenvelope[590223.4382724703 : 608462.4604629107, 4914107.882513998 : 4920523.89081033]         remoteowstype = null         remoteowsurl = null         env = {}         formatoptions = {}         angle = 0.0         cqlfilter = null         elevation = []         featureid = null         startindex = null         viewparams = null         crs = projcs["nad27 / utm zone 13n",   geogcs["nad27",     datum["north american datum 1927",       spheroid["clarke 1866", 6378206.4, 294.9786982138982, authority["epsg","7008"]],       towgs84[2.478, 149.752, 197.726, 0.526, -0.498, 0.501, 0.685],       authority["epsg","6267"]],     primem["greenwich", 0.0, authority["epsg","8901"]],     unit["degree", 0.017453292519943295],     axis["geodetic longitude", east],     axis["geodetic latitude", north],     authority["epsg","4267"]],   projection["transverse_mercator", authority["epsg","9807"]],   parameter["central_meridian", -105.0],   parameter["latitude_of_origin", 0.0],   parameter["scale_factor", 0.9996],   parameter["false_easting", 500000.0],   parameter["false_northing", 0.0],   unit["m", 1.0],   axis["easting", east],   axis["northing", north],   authority["epsg","26713"]]         bgcolor = java.awt.color[r=255,g=255,b=255]         transparent = false         sldbody = null         validateschema = false         sld = null         sldversion = null         tilesorigin = null         exceptions = se_xml         height = 330         width = 938         filter = null         time = []         format = image/png         buffer = 0         request = getmap         rawkvp = {bbox=590223.4382724703,4914107.882513998,608462.4604629107,4920523.89081033, version=1.1.0, format=image/png, service=wms, height=330, request=getmap, layers=sf:bugsites, styles=, width=938, srs=epsg:26713}         = true         baseurl = http://localhost:80/geoserver/         requestcharset = utf-8         version = 1.1.0 08 apr 10:21:34 error [geoserver.ows] - java.lang.noclassdeffounderror: not initialize class org.geotools.image.imageworker         @ org.geoserver.wms.map.pngmapresponse.formatimageoutputstream(pngmapresponse.java:117)         @ org.geoserver.wms.map.renderedimagemapresponse.write(renderedimagemapresponse.java:122)         @ org.geoserver.ows.dispatcher.response(dispatcher.java:919)         @ org.geoserver.ows.dispatcher.handlerequestinternal(dispatcher.java:276)         @ org.springframework.web.servlet.mvc.abstractcontroller.handlerequest(abstractcontroller.java:153)         @ org.springframework.web.servlet.mvc.simplecontrollerhandleradapter.handle(simplecontrollerhandleradapter.java:48)         @ org.springframework.web.servlet.dispatcherservlet.dodispatch(dispatcherservlet.java:923)         @ org.springframework.web.servlet.dispatcherservlet.doservice(dispatcherservlet.java:852)         @ org.springframework.web.servlet.frameworkservlet.processrequest(frameworkservlet.java:882)         @ org.springframework.web.servlet.frameworkservlet.doget(frameworkservlet.java:778)         @ javax.servlet.http.httpservlet.service(httpservlet.java:707)         @ javax.servlet.http.httpservlet.service(httpservlet.java:820)         @ org.mortbay.jetty.servlet.servletholder.handle(servletholder.java:487)         @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1093)         @ org.geoserver.filters.threadlocalscleanupfilter.dofilter(threadlocalscleanupfilter.java:27)         @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1084)         @ org.geoserver.filters.springdelegatingfilter$chain.dofilter(springdelegatingfilter.java:74)         @ org.geoserver.filters.springdelegatingfilter.dofilter(springdelegatingfilter.java:45)         @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1084)         @ org.geoserver.platform.advanceddispatchfilter.dofilter(advanceddispatchfilter.java:49)         @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1084)         @ org.vfny.geoserver.filters.setcharacterencodingfilter.dofilter(setcharacterencodingfilter.java:109)         @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1084)         @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:311)         @ org.geoserver.security.filter.geoservercompositefilter$nestedfilterchain.dofilter(geoservercompositefilter.java:68)         @ org.springframework.security.web.access.intercept.filtersecurityinterceptor.invoke(filtersecurityinterceptor.java:116)         @ org.springframework.security.web.access.intercept.filtersecurityinterceptor.dofilter(filtersecurityinterceptor.java:83)         @ org.geoserver.security.filter.geoservercompositefilter$nestedfilterchain.dofilter(geoservercompositefilter.java:72)         @ org.geoserver.security.filter.geoservercompositefilter.dofilter(geoservercompositefilter.java:91)         @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:323)         @ org.geoserver.security.filter.geoservercompositefilter$nestedfilterchain.dofilter(geoservercompositefilter.java:68)         @ org.springframework.security.web.access.exceptiontranslationfilter.dofilter(exceptiontranslationfilter.java:113)         @ org.geoserver.security.filter.geoservercompositefilter$nestedfilterchain.dofilter(geoservercompositefilter.java:72)         @ org.geoserver.security.filter.geoservercompositefilter.dofilter(geoservercompositefilter.java:91)         @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:323)         @ org.geoserver.security.filter.geoserveranonymousauthenticationfilter.dofilter(geoserveranonymousauthenticationfilter.java:53)         @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:323)         @ org.geoserver.security.filter.geoservercompositefilter$nestedfilterchain.dofilter(geoservercompositefilter.java:68)         @ org.springframework.security.web.authentication.www.basicauthenticationfilter.dofilter(basicauthenticationfilter.java:150)         @ org.geoserver.security.filter.geoservercompositefilter$nestedfilterchain.dofilter(geoservercompositefilter.java:72)         @ org.geoserver.security.filter.geoservercompositefilter.dofilter(geoservercompositefilter.java:91)         @ org.geoserver.security.filter.geoserverbasicauthenticationfilter.dofilter(geoserverbasicauthenticationfilter.java:82)         @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:323)         @ org.geoserver.security.filter.geoservercompositefilter$nestedfilterchain.dofilter(geoservercompositefilter.java:68)         @ org.springframework.security.web.context.securitycontextpersistencefilter.dofilter(securitycontextpersistencefilter.java:87)         @ org.geoserver.security.filter.geoserversecuritycontextpersistencefilter$1.dofilter(geoserversecuritycontextpersistencefilter.java:46)         @ org.geoserver.security.filter.geoservercompositefilter$nestedfilterchain.dofilter(geoservercompositefilter.java:72)         @ org.geoserver.security.filter.geoservercompositefilter.dofilter(geoservercompositefilter.java:91)         @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:323)         @ org.springframework.security.web.filterchainproxy.dofilter(filterchainproxy.java:173)         @ org.geoserver.security.geoserversecurityfilterchainproxy.dofilter(geoserversecurityfilterchainproxy.java:103)         @ org.springframework.web.filter.delegatingfilterproxy.invokedelegate(delegatingfilterproxy.java:346)         @ org.springframework.web.filter.delegatingfilterproxy.dofilter(delegatingfilterproxy.java:259)         @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1084)         @ org.geoserver.filters.loggingfilter.dofilter(loggingfilter.java:75)         @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1084)         @ org.geoserver.filters.gzipfilter.dofilter(gzipfilter.java:42)         @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1084)         @ org.geoserver.filters.sessiondebugfilter.dofilter(sessiondebugfilter.java:47)         @ org.mortbay.jetty.servlet.servlethandler$cachedchain.dofilter(servlethandler.java:1084)         @ org.mortbay.jetty.servlet.servlethandler.handle(servlethandler.java:360)         @ org.mortbay.jetty.security.securityhandler.handle(securityhandler.java:216)         @ org.mortbay.jetty.servlet.sessionhandler.handle(sessionhandler.java:181)         @ org.mortbay.jetty.handler.contexthandler.handle(contexthandler.java:726)         @ org.mortbay.jetty.webapp.webappcontext.handle(webappcontext.java:405)         @ org.mortbay.jetty.handler.contexthandlercollection.handle(contexthandlercollection.java:206)         @ org.mortbay.jetty.handler.handlercollection.handle(handlercollection.java:114)         @ org.mortbay.jetty.handler.handlerwrapper.handle(handlerwrapper.java:152)         @ org.mortbay.jetty.server.handle(server.java:324)         @ org.mortbay.jetty.httpconnection.handlerequest(httpconnection.java:505)         @ org.mortbay.jetty.httpconnection$requesthandler.headercomplete(httpconnection.java:828)         @ org.mortbay.jetty.httpparser.parsenext(httpparser.java:514)         @ org.mortbay.jetty.httpparser.parseavailable(httpparser.java:211)         @ org.mortbay.jetty.httpconnection.handle(httpconnection.java:380)         @ org.mortbay.io.nio.selectchannelendpoint.run(selectchannelendpoint.java:395)         @ org.mortbay.thread.boundedthreadpool$poolthread.run(boundedthreadpool.java:450) 

i resolved this. apparently oracle has decided not distribute pycc.pf jre , distributed jdk. put copy in jre\lib\cmm directory , wms started working. perhaps geoserver installation should add required file since jre no longer does.