title: Deploying a JSF webapp results in java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config
body: <p>I get an error, when I started my JavaServer Faces application. On the browser I get following error:</p>
  
  <pre><code>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.
  </code></pre>
  
  <p>On my Eclipse IDE follwoing error:</p>
  
  <pre><code>    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)
  </code></pre>
  
  <p>How is this caused and how can I solve it?</p>