If you move your project another places, you can take this error. To fix it, clean below folder inside after close Netbeans and Tomcat. Vista / 7 : C:\Users\kullanici-adi\.netbeans\version-num(ör:6.9)\config\J2EE\TargetModules XP : C:\Documents and Settings\kullanici-adi\.netbeans\version-num(ör:6.9)\config\J2EE\TargetModules java.io.IOException: tmpFile.renameTo(classFile) failed org.apache.jasper.compiler.SmapUtil$SDEInstaller.install(SmapUtil.java:246) org.apache.jasper.compiler.SmapUtil.installSmap(SmapUtil.java:165) org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:454) org.apache.jasper.compiler.Compiler.compile(Compiler.java:349) org.apache.jasper.compiler.Compiler.compile(Compiler.java:327) org.apache.jasper.compiler.Compiler.compile(Compiler.java:314) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:589) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:62) org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:109) org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:138) org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:83) org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:67) org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:359) org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:275) […]