Some issues with xwiki

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi! A few days ago I have installed xwiki for the first time and I'm really impressed with this application! Installation was quite easy and the functionality is impressive. I've used other wiki software before but XWiki seems to be the best I've seen so far! I'm running XWiki under Linux and did one test installation using JBoss-4.0.3, JDK-1.5.0_05 and PostgreSQL-8.0.3 (using the postgresql-8.0-312.jdbc3.jar JDBC driver) and another test installation with Tomcat-5.5.10 and the same JDK and PostgreSQL database. But even if for the user almost everything is working fine, as an admin I have found some (minor?) issues: a) I want to use LDAP authentication of our users. This does work in principle using the following xwiki.authentication configuration in xwiki.cfg: [...] xwiki.authentication=form xwiki.authentication.validationKey=totototototototototototototototo xwiki.authentication.encryptionKey=titititititititititititititititi xwiki.authentication.cookiedomains=xwiki.intern.xss.co.at xwiki.authentication.useip=false xwiki.authentication.ldap=1 xwiki.authentication.ldap.check_level=1 xwiki.authentication.ldap.server=ldap.intern.xss.co.at xwiki.authentication.ldap.base_DN=ou=people,ou=accounts,dc=xss,dc=co,dc=at xwiki.authentication.ldap.bind_DN=uid={0},ou=people,ou=accounts,dc=xss,dc=co,dc=at xwiki.authentication.ldap.bind_pass={1} xwiki.authentication.ldap.UID_attr=uid xwiki.authentication.ldap.fields_mapping=name=uid,last_name=sn,first_name=givenName,fullname=cn,mail=mail,ldap_dn=dn [...] The problem is: for each page the user loads and each action the user does with XWiki, the XWiki engine does a LDAP bind and search on the LDAP server like this: Oct 26 13:15:29 kant slapd[27005]: conn=17958 fd=34 ACCEPT from IP=192.168.162.15:40645 (IP=0.0.0.0:389) Oct 26 13:15:29 kant slapd[27018]: conn=17958 op=0 BIND dn="uid=andreas,ou=people,ou=accounts,dc=xss,dc=co,dc=at" method=128 Oct 26 13:15:29 kant slapd[27018]: conn=17958 op=0 BIND dn="uid=andreas,ou=people,ou=accounts,dc=xss,dc=co,dc=at" mech=SIMPLE ssf=0 Oct 26 13:15:29 kant slapd[27018]: conn=17958 op=0 RESULT tag=97 err=0 text= Oct 26 13:15:29 kant slapd[27032]: conn=17958 op=1 SRCH base="ou=people,ou=accounts,dc=xss,dc=co,dc=at" scope=2 deref=0 filter="(uid=andreas)" Oct 26 13:15:29 kant slapd[27032]: conn=17958 op=1 SEARCH RESULT tag=101 err=0 nentries=1 text= Oct 26 13:15:29 kant slapd[16011]: conn=17958 op=2 UNBIND Oct 26 13:15:29 kant slapd[16011]: conn=17958 fd=34 closed When many people are working with XWiki, this produces a noticable load on the LDAP server. IMHO this could be avoided by authenticating the user once when the session is created on user logon time and then use the session information further on. Doesn't XWiki work this way? Or have I done something wrong with the LDAP configuration? Perhaps this problem is linked with the next problem (hibernate exceptions)? b) I have installed XWiki under JBoss-4.0.3 and also standalone Tomcat-5.5.10 using a PostgreSQL database backend and with both installations I see many of the following exceptions in the logs: JBoss installation: [...] 13:01:38,906 WARN [RequestUtils] No FormBeanConfig found under 'view' 13:01:38,908 INFO [DBCPConnectionProvider] active: 1 (max: 50) idle: 0(max: 5) 13:01:38,967 INFO [DefaultLoadEventListener] Error performing load command org.hibernate.ObjectNotFoundException: No row with the given identifier exists: [com.xpn.xwiki.objects.classes.BaseClass#-1689278214] at org.hibernate.ObjectNotFoundException.throwIfNull(ObjectNotFoundException.java:27) at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:118) at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:167) at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:79) at org.hibernate.impl.SessionImpl.load(SessionImpl.java:588) at com.xpn.xwiki.store.XWikiHibernateStore.loadXWikiClass(XWikiHibernateStore.java:1194) at com.xpn.xwiki.store.XWikiHibernateStore.loadXWikiDoc(XWikiHibernateStore.java:589) at com.xpn.xwiki.store.XWikiCacheStore.loadXWikiDoc(XWikiCacheStore.java:123) at com.xpn.xwiki.XWiki.getDocument(XWiki.java:565) at com.xpn.xwiki.XWiki.getDocument(XWiki.java:599) at com.xpn.xwiki.XWiki.getDocumentFromPath(XWiki.java:637) at com.xpn.xwiki.XWiki.prepareDocuments(XWiki.java:2428) 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.doGet(ActionServlet.java:397) at javax.servlet.http.HttpServlet.service(HttpServlet.java:697) at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) 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.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81) 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.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59) 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:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) at java.lang.Thread.run(Thread.java:595) [...] Tomcat installation: [...] 13:20:33,221 ERROR http-8080-Processor25 http://tolstoi.intern.xss.co.at:8080/xwiki/bin/view/Main/WebHome AssertionFailure:<init>:22 - an assertion failure occured (this may indicate a bug in Hibernate, but is more likely due to unsafe use of the session) org.hibernate.AssertionFailure: possible nonthreadsafe access to session at org.hibernate.action.EntityDeleteAction.execute(EntityDeleteAction.java:68) 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:141) 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 org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:320) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:86) at com.xpn.xwiki.store.XWikiHibernateStore.endTransaction(XWikiHibernateStore.java:350) at com.xpn.xwiki.store.XWikiHibernateStore.deleteXWikiCollection(XWikiHibernateStore.java:982) at com.xpn.xwiki.stats.impl.XWikiStatsServiceImpl.notify(XWikiStatsServiceImpl.java:209) at com.xpn.xwiki.notify.XWikiActionRule.verify(XWikiActionRule.java:51) at com.xpn.xwiki.notify.XWikiNotificationManager.verify(XWikiNotificationManager.java:93) at com.xpn.xwiki.web.ViewEditAction.execute(ViewEditAction.java:268) 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.doGet(ActionServlet.java:397) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) 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:857) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) 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:595) com.xpn.xwiki.XWikiException: Error number 3213 in 3: Exception while deleting object XWiki.andreas Wrapped Exception: possible nonthreadsafe access to session at com.xpn.xwiki.store.XWikiHibernateStore.deleteXWikiCollection(XWikiHibernateStore.java:986) at com.xpn.xwiki.stats.impl.XWikiStatsServiceImpl.notify(XWikiStatsServiceImpl.java:209) at com.xpn.xwiki.notify.XWikiActionRule.verify(XWikiActionRule.java:51) at com.xpn.xwiki.notify.XWikiNotificationManager.verify(XWikiNotificationManager.java:93) at com.xpn.xwiki.web.ViewEditAction.execute(ViewEditAction.java:268) 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.doGet(ActionServlet.java:397) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) 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:857) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) 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:595) [...] - From the user point of view, XWiki seems to be performing just fine, it's only in the logs I see those errors. What do they mean? Should I have to worry? c) there is one error noticable even for normal users: the PDF export produces wrong results for text inside the {code} ... {code} tags. You even can find an example for this on xwiki.org: Just do a PDF export on the page at <http://www.xwiki.org/xwiki/bin/view/Main/PostgresHibernate> and you'll see that line breaks are not formatted correctly. I'm still in the process of learning the major concepts behind XWiki, so please give me any advice which might be necessary to solve this problems. Thanks! - - andreas - -- Andreas Haumer | mailto:andreas@xss.co.at *x Software + Systeme | http://www.xss.co.at/ Karmarschgasse 51/2/20 | Tel: +43-1-6060114-0 A-1100 Vienna, Austria | Fax: +43-1-6060114-71