Hi all, I'm looking at an XWiki 0.9.840 instance here with an unusual problem. Often, users are not correctly added to the XWikiAllGroup when their account is created. It appears to be an intermittent problem. Looking at the log, I see a bunch of stack traces like the one below. Hibernate is running into duplicate key issues when persisting to DB. I suspect this is related. Any ideas how this could be happening? Anyone seen anything similar? Regards, Robin Could not synchronize database state with session org.hibernate.exception.ConstraintViolationException: could not insert: [com.xpn.xwiki.objects.StringProperty] at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:74) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.persister.entity.BasicEntityPersister.insert(BasicEntityPersister.java:1859) at org.hibernate.persister.entity.BasicEntityPersister.insert(BasicEntityPersister.java:2190) at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:46) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:239) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:223) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:136) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:274) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:726) at com.xpn.xwiki.store.XWikiHibernateStore.saveXWikiProperty(XWikiHibernateStore.java:1076) at com.xpn.xwiki.store.XWikiHibernateStore.saveXWikiCollection(XWikiHibernateStore.java:873) at com.xpn.xwiki.store.XWikiHibernateStore.saveXWikiObject(XWikiHibernateStore.java:825) at com.xpn.xwiki.XWiki.SetUserDefaultGroup(XWiki.java:1809) at com.ibm.ibmxwiki.BluepagesLDAPAuthServiceImpl.CreateUserFromLDAP(Unknown Source) at com.ibm.ibmxwiki.BluepagesLDAPAuthServiceImpl.authenticate(Unknown Source) at com.xpn.xwiki.user.impl.xwiki.MyFormAuthenticator.authenticate(MyFormAuthenticator.java:173) at com.xpn.xwiki.user.impl.xwiki.MyFormAuthenticator.processLogin(MyFormAuthenticator.java:112) at com.xpn.xwiki.user.impl.xwiki.XWikiAuthServiceImpl.checkAuth(XWikiAuthServiceImpl.java:161) at com.xpn.xwiki.XWiki.checkAuth(XWiki.java:1860) at com.xpn.xwiki.user.impl.xwiki.XWikiRightServiceImpl.checkAccess(XWikiRightServiceImpl.java:94) at com.xpn.xwiki.XWiki.checkAccess(XWiki.java:1865) at com.xpn.xwiki.XWiki.prepareDocuments(XWiki.java:2436) at com.xpn.xwiki.web.ViewEditAction.execute(ViewEditAction.java:133) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415) at javax.servlet.http.HttpServlet.service(HttpServlet.java:709) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:127) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:797) Caused by: java.sql.SQLException: Duplicate entry '1743317516-member' for key 1 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2847) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1531) at com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1347) at com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:958) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1957) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1880) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1741) at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:101) at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:101) at org.hibernate.persister.entity.BasicEntityPersister.insert(BasicEntityPersister.java:1846) ... 45 more