java.util.ConcurrentModificationException: This exception has no message.

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Solutions on the web

via XWiki.org JIRA by Anca Luca, 1 year ago
This exception has no message.
via Oracle Community by 652450, 1 year ago
via Oracle Community by 935919, 1 year ago
This exception has no message.
via https://bugzilla.redhat.com/bugzilla/ by Ondřej Žižka, 1 year ago
via https://bugzilla.redhat.com/bugzilla/ by Charles Crouch, 1 year ago
java.util.ConcurrentModificationException:
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:841)
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.(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 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 com.xpn.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:155)
at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:117)
at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:68)
at com.xpn.xwiki.web.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:295)
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)

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