[xwiki-users] Exception during creation of datasource

Hi, I have to deal some external data in my XE 1.3.2. I am using Mysql 5.0 and Jetty 5.1.5. I followed this http://xwikisql.gradsoft.ua/docs/XWikiSqlPluginGuide.html and write the code ##receive database #set($mydb=$xwiki.sql.getDatabase("test")) #set($result=$mydb.executeUpdate("update student set Name = ? where RNo = ?", ["Happy", 28])) When I saved this, nothing on the page but in the start console it shows:- 2008-05-21 12:53:54,781 [http://localhost:8181/xwiki/bin/view/main/amma] [P1-18] ERROR xwikisql.SqlPlugin - exception during creation of datasource test javax.naming.NoInitialContextException: Need to specify class name in environmen t or system property, or as an applet parameter, or in an application resource f ile: java.naming.factory.initial at javax.naming.spi.NamingManager.getInitialContext(Unknown Source) at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source) at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source) at javax.naming.InitialContext.lookup(Unknown Source) at ua.gradsoft.xwikisql.SqlPlugin.createDataSource(SqlPlugin.java:95) at ua.gradsoft.xwikisql.SqlPlugin.createDatabase(SqlPlugin.java:84) at ua.gradsoft.xwikisql.SqlPluginApi.getDatabase(SqlPluginApi.java:30) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.in voke(UberspectImpl.java:295) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.j ava:245) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTRefer ence.java:203) at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReferen ce.java:419) at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpres sion.java:73) at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSet Directive.java:125) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode. java:318) at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRend erer.java:241) at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRend erer.java:155) at com.xpn.xwiki.render.XWikiVelocityRenderer.render(XWikiVelocityRender er.java:95) at com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXW ikiRenderingEngine.java:252) at com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXW ikiRenderingEngine.java:176) at com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderText(DefaultXW ikiRenderingEngine.java:145) at com.xpn.xwiki.render.DefaultXWikiRenderingEngine.renderDocument(Defau ltXWikiRenderingEngine.java:134) at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java :418) at com.xpn.xwiki.api.Document.getRenderedContent(Document.java:371) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.in voke(UberspectImpl.java:295) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.j ava:245) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTRefer ence.java:203) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTRefere nce.java:294) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode. java:318) at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRend erer.java:241) at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRend erer.java:155) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1429) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:598) at sun.reflect.GeneratedMethodAccessor83.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.in voke(UberspectImpl.java:295) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.j ava:245) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTRefer ence.java:203) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTRefere nce.java:294) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode. java:318) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(Velocim acroProxy.java:194) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirect ive.java:170) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java :74) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfSt atement.java:88) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java :74) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode. java:318) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfSt atement.java:107) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode. java:318) at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRend erer.java:241) at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRend erer.java:155) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1429) at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:108) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:208) at org.apache.struts.action.RequestProcessor.processActionPerform(Reques tProcessor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.ja va:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:119 6) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:596) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428 ) at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter( WebApplicationHandler.java:830) at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEnc odingFilter.java:117) at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter( WebApplicationHandler.java:821) at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicati onHandler.java:471) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:5 68) at org.mortbay.http.HttpContext.handle(HttpContext.java:1565) at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplication Context.java:633) at org.mortbay.http.HttpContext.handle(HttpContext.java:1517) at org.mortbay.http.HttpServer.service(HttpServer.java:954) at org.mortbay.http.HttpConnection.service(HttpConnection.java:816) at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:983) at org.mortbay.http.HttpConnection.handle(HttpConnection.java:833) at org.mortbay.http.SocketListener.handleConnection(SocketListener.java: 244) at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357) at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534) Where is my fault? Regards, Project trainees.