Deploying a JSF webapp results in java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config
jsf, tomcat7
Solution
java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config
A `ClassNotFoundException` means that the specified class is missing in the runtime classpath. As the package name hints, it's part of JSTL.
JSF (more specifically, Facelets) has indeed a dependency on JSTL for the `<c:xxx>` tags. When JSF loads, it's implicitly also loading JSTL core taglib configuration. However, if it cannot be found, you'll get exactly this exception.
JSTL (and JSF!) is normally already provided out the box on Java EE container such as JBoss AS/EAP/WildFly, GlassFish, TomEE, WebLogic, etcetera. However, you're using Tomcat, which is a barebones JSP/Servlet container and doesn't ship with JSTL out the box. If upgrading to e.g. TomEE is not an option, you'd need to manuall supply JSTL along with the webapp, like as you did for JSF.
Just download jstl-1.2.jar and drop it in `/WEB-INF/lib` folder of your webapp, along with the JSF JAR(s).
See also:
- Our JSTL wiki page
Problem
I get an error, when I started my JavaServer Faces application. On the browser I get following error: ``` HTTP Status 500 - -------------------------------------------------------------------------------- type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception javax.servlet.ServletException: javax/servlet/jsp/jstl/core/Config javax.faces.webapp.FacesServlet.service(FacesServlet.java:229) root cause java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config org.apache.myfaces.view.jsp.JspViewDeclarationLanguage.buildView(JspViewDeclarationLanguage.java:91) org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:77) org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:241) javax.faces.webapp.FacesServlet.service(FacesServlet.java:199) root cause java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521) org.apache.myfaces.view.jsp.JspViewDeclarationLanguage.buildView(JspViewDeclarationLanguage.java:91) org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:77) org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:241) javax.faces.webapp.FacesServlet.service(FacesServlet.java:199) note The full stack trace of the root cause is available in the Apache Tomcat/7.0.12 logs. ``` On my Eclipse IDE follwoing error: ``` Nov 19, 2013 8:37:17 PM org.apache.catalina.startup.Catalina start Information: Server startup in 2518 ms Nov 19, 2013 8:37:18 PM org.apache.catalina.core.StandardWrapperValve invoke Schwerwiegend: Servlet.service() for servlet [Faces Servlet] in context with path [/de.xxx.jsf.first] threw exception [javax/servlet/jsp/jstl/core/Config] with root cause java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521) at org.apache.myfaces.view.jsp.JspViewDeclarationLanguage.buildView(JspViewDeclarationLanguage.java:91) at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:77) at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:241) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:199) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) ``` How is this caused and how can I solve it?