External modifications

20.04.2011 14:20:12 ERROR [org.onehippo.forge.relateddocs.RelatedDocCollection.remove():211] e8b352d6-e9b4-4d81-ab4d-6329bcd08a3d has been modified externally
javax.jcr.InvalidItemStateException: e8b352d6-e9b4-4d81-ab4d-6329bcd08a3d has been modified externally
at org.apache.jackrabbit.core.ItemSaveOperation.perform(ItemSaveOperation.java:262)
at org.apache.jackrabbit.core.session.SessionState.perform(SessionState.java:200)
at org.apache.jackrabbit.core.ItemImpl.perform(ItemImpl.java:91)
at org.apache.jackrabbit.core.ItemImpl.save(ItemImpl.java:329)
at org.apache.jackrabbit.core.session.SessionSaveOperation.perform(SessionSaveOperation.java:42)
at org.apache.jackrabbit.core.session.SessionState.perform(SessionState.java:200)
at org.apache.jackrabbit.core.SessionImpl.perform(SessionImpl.java:359)
at org.apache.jackrabbit.core.SessionImpl.save(SessionImpl.java:762)
at org.hippoecm.repository.decorating.SessionDecorator.save(SessionDecorator.java:204)
at org.hippoecm.repository.impl.SessionDecorator.save(SessionDecorator.java:185)
at org.hippoecm.repository.decorating.checked.SessionDecorator.save(SessionDecorator.java:229)
at org.onehippo.forge.relateddocs.RelatedDocCollection.remove(RelatedDocCollection.java:206) <--- !!
at org.onehippo.forge.relateddocs.editor.RelatedDocsPlugin$2$3.onClick(RelatedDocsPlugin.java:224)
at org.apache.wicket.ajax.markup.html.AjaxLink$1.onEvent(AjaxLink.java:68)
at org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:177)
at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:302)
at org.apache.wicket.request.target.component.listener.BehaviorRequestTarget.processEvents(BehaviorRequestTarget.java:157)
at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
at org.hippoecm.frontend.PluginRequestCycleProcessor.processEvents(PluginRequestCycleProcessor.java:95)
at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1250)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1436)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:319)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.hippoecm.frontend.ResourceRewriteFilter.doFilter(ResourceRewriteFilter.java:129)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.hippoecm.frontend.plugins.login.ConcurrentLoginFilter.doFilter(ConcurrentLoginFilter.java:54)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:396)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.jackrabbit.core.state.StaleItemStateException: e8b352d6-e9b4-4d81-ab4d-6329bcd08a3d has been modified externally
at org.apache.jackrabbit.core.state.SharedItemStateManager$Update.begin(SharedItemStateManager.java:678)
at org.apache.jackrabbit.core.state.SharedItemStateManager.beginUpdate(SharedItemStateManager.java:1461)
at org.apache.jackrabbit.core.state.SharedItemStateManager.update(SharedItemStateManager.java:1491)
at org.hippoecm.repository.jackrabbit.HippoSharedItemStateManager.update(HippoSharedItemStateManager.java:59)
at org.apache.jackrabbit.core.state.LocalItemStateManager.update(LocalItemStateManager.java:351)
at org.apache.jackrabbit.core.state.ForkedXAItemStateManager.update(ForkedXAItemStateManager.java:357)
at org.hippoecm.repository.jackrabbit.HippoLocalItemStateManager.update(HippoLocalItemStateManager.java:265)
at org.apache.jackrabbit.core.state.LocalItemStateManager.update(LocalItemStateManager.java:326)
at org.hippoecm.repository.jackrabbit.HippoLocalItemStateManager.update(HippoLocalItemStateManager.java:273)
at org.apache.jackrabbit.core.state.SessionItemStateManager.update(SessionItemStateManager.java:289)
at org.apache.jackrabbit.core.ItemSaveOperation.perform(ItemSaveOperation.java:258)
... 44 more