Detailed information:

    Error number 0 in 11: Uncaught exception
Wrapped Exception: Could not initialize class javax.imageio.ImageTypeSpecifier
com.xpn.xwiki.XWikiException: Error number 0 in 11: Uncaught exception
Wrapped Exception: Could not initialize class javax.imageio.ImageTypeSpecifier
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:308)
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:128)
	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.trumbull.xwiki.web.WeblogicCookieFilter.doFilter(WeblogicCookieFilter.java:37)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:120)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:144)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:66)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1008)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:701)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class javax.imageio.ImageTypeSpecifier
	at com.sun.imageio.plugins.png.PNGImageReader.getImageTypes(PNGImageReader.java:1387)
	at com.sun.imageio.plugins.png.PNGImageReader.readImage(PNGImageReader.java:1282)
	at com.sun.imageio.plugins.png.PNGImageReader.read(PNGImageReader.java:1579)
	at javax.imageio.ImageIO.read(ImageIO.java:1438)
	at javax.imageio.ImageIO.read(ImageIO.java:1342)
	at com.xpn.xwiki.internal.plugin.image.DefaultImageProcessor.readImage(DefaultImageProcessor.java:58)
	at com.xpn.xwiki.plugin.image.ImagePlugin.shrinkImage(ImagePlugin.java:317)
	at com.xpn.xwiki.plugin.image.ImagePlugin.downloadImageFromCache(ImagePlugin.java:291)
	at com.xpn.xwiki.plugin.image.ImagePlugin.downloadImage(ImagePlugin.java:254)
	at com.xpn.xwiki.plugin.image.ImagePlugin.downloadAttachment(ImagePlugin.java:227)
	at com.xpn.xwiki.plugin.XWikiPluginManager.downloadAttachment(XWikiPluginManager.java:285)
	at com.xpn.xwiki.web.DownloadAction.render(DownloadAction.java:90)
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:285)
	... 41 more


Wrapped Exception:

java.lang.NoClassDefFoundError: Could not initialize class javax.imageio.ImageTypeSpecifier
	at com.sun.imageio.plugins.png.PNGImageReader.getImageTypes(PNGImageReader.java:1387)
	at com.sun.imageio.plugins.png.PNGImageReader.readImage(PNGImageReader.java:1282)
	at com.sun.imageio.plugins.png.PNGImageReader.read(PNGImageReader.java:1579)
	at javax.imageio.ImageIO.read(ImageIO.java:1438)
	at javax.imageio.ImageIO.read(ImageIO.java:1342)
	at com.xpn.xwiki.internal.plugin.image.DefaultImageProcessor.readImage(DefaultImageProcessor.java:58)
	at com.xpn.xwiki.plugin.image.ImagePlugin.shrinkImage(ImagePlugin.java:317)
	at com.xpn.xwiki.plugin.image.ImagePlugin.downloadImageFromCache(ImagePlugin.java:291)
	at com.xpn.xwiki.plugin.image.ImagePlugin.downloadImage(ImagePlugin.java:254)
	at com.xpn.xwiki.plugin.image.ImagePlugin.downloadAttachment(ImagePlugin.java:227)
	at com.xpn.xwiki.plugin.XWikiPluginManager.downloadAttachment(XWikiPluginManager.java:285)
	at com.xpn.xwiki.web.DownloadAction.render(DownloadAction.java:90)
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:285)
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:128)
	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.trumbull.xwiki.web.WeblogicCookieFilter.doFilter(WeblogicCookieFilter.java:37)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:120)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:144)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:66)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1008)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:701)