xwiki error 3021

Hi, I've been using xwiki for a month now without problems. I use it as an internal tool with less than 5 users. Yesterday I have started to have some problems when saving pages. When I write a add text to an existing page or I write a new page I often (not always) have the following error: Error number 3201 in 3: Exception while saving document Projects.xwikiPb Wrapped Exception: Could not execute JDBC batch update com.xpn.xwiki.XWikiException: Error number 3201 in 3: Exception while saving document Projects.xwikiPb Wrapped Exception: Could not execute JDBC batch update at com.xpn.xwiki.store.XWikiHibernateStore.saveXWikiDoc(XWikiHibernateStore .java:540) at com.xpn.xwiki.store.XWikiHibernateStore.saveXWikiDoc(XWikiHibernateStore .java:557) at com.xpn.xwiki.store.XWikiCacheStore.saveXWikiDoc(XWikiCacheStore.java:77 ) at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:560) at com.xpn.xwiki.XWikiService.actionSave(XWikiService.java:445) at com.xpn.xwiki.web.ViewEditAction.execute(ViewEditAction.java:155) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestPr ocessor.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(Applica tionFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt erChain.java:173) at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodi ngFilter.java:127) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica tionFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt erChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv e.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv e.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:1 48) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:86 9) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.proc essConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint .java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollow erWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool .java:684) at java.lang.Thread.run(Unknown Source) Wrapped Exception: java.sql.BatchUpdateException: Data truncation: Data too long for column 'XWD_CONTENT' at row 1 at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement. java:1103) at com.mysql.jdbc.PreparedStatement.executeBatch(PreparedStatement.java:853 ) at org.apache.commons.dbcp.DelegatingStatement.executeBatch(DelegatingState ment.java:294) at org.apache.commons.dbcp.DelegatingStatement.executeBatch(DelegatingState ment.java:294) at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:5 7) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:172 ) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:226) 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(DefaultFlushEv entListener.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(XWikiHibernateSto re.java:350) at com.xpn.xwiki.store.XWikiHibernateStore.saveXWikiDoc(XWikiHibernateStore .java:535) at com.xpn.xwiki.store.XWikiHibernateStore.saveXWikiDoc(XWikiHibernateStore .java:557) at com.xpn.xwiki.store.XWikiCacheStore.saveXWikiDoc(XWikiCacheStore.java:77 ) at com.xpn.xwiki.XWiki.saveDocument(XWiki.java:560) at com.xpn.xwiki.XWikiService.actionSave(XWikiService.java:445) at com.xpn.xwiki.web.ViewEditAction.execute(ViewEditAction.java:155) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestPr ocessor.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(Applica tionFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt erChain.java:173) at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodi ngFilter.java:127) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica tionFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt erChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv e.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv e.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:1 48) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:86 9) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.proc essConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint .java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollow erWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool .java:684) at java.lang.Thread.run(Unknown Source) Nonetheless the exception I can edit and view the page. When I edit it, I have a similar exception but for the XWD_ARCHIVE column When I delete the page I have another exception saying that the page does not exist even thought it is still displayed When I restart Tomcat, the page is really deleted. I am using: - Tomcat 5.0 (same problems with Tomcat 5.5) - MySql 5.0 (I check tables for corruption with mysql administrator and everything seems fine) I tried the following to solve my problem without success: - I already configured xwiki to support large attachments. - I modified the hibernate.cgf file with the useServerPrepStmts=false option - I tried with mysql 5.0 driver - I checked for resource usage Thanks for any help. Frederic Aymard