Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via XWiki.org JIRA by Anca Luca, 1 year ago
via Oracle Community by 652450, 2 years ago
via Oracle Community by 935919, 2 years ago
This exception has no message.
via https://bugzilla.redhat.com/bugzilla/ by Ondřej Žižka, 2 years ago
via https://bugzilla.redhat.com/bugzilla/ by Charles Crouch, 2 years ago
java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextEntry(HashMap.java:841) at java.util.HashMap$ValueIterator.next(HashMap.java:871) at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:253) at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:232) at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:1330) at com.xpn.xwiki.plugin.watchlist.WatchListJobManager.initWatchListJobClass(WatchListJobManager.java:151) at com.xpn.xwiki.plugin.watchlist.WatchListJobManager.init(WatchListJobManager.java:280) at com.xpn.xwiki.plugin.watchlist.WatchListPlugin.init(WatchListPlugin.java:116) at com.xpn.xwiki.plugin.XWikiPluginManager.initPlugin(XWikiPluginManager.java:155) at com.xpn.xwiki.plugin.XWikiPluginManager.addPlugin(XWikiPluginManager.java:92) at com.xpn.xwiki.plugin.XWikiPluginManager.addPlugins(XWikiPluginManager.java:120) at com.xpn.xwiki.XWiki.preparePlugins(XWiki.java:1046) at com.xpn.xwiki.XWiki.initXWiki(XWiki.java:751) at com.xpn.xwiki.XWiki.<init>(XWiki.java:682) at com.xpn.xwiki.XWiki.getMainXWiki(XWiki.java:319) at com.xpn.xwiki.XWiki.getXWiki(XWiki.java:400) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:135) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:115) 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:707) 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$CachedChain.doFilter(ServletHandler.java:1157) at com.xpn.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:155) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148) at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:117) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148) at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:68) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148) at com.xpn.xwiki.web.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:295) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148) at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:112) at org.mortbay.jetty.servlet.ServletHandler$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.HandlerCollection.handle(HandlerCollection.java:114) 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)