title: java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/ConditionalTagSupport
body: <p>While I am deploying and runing my web application on Apache Tomcat in Eclipse IDE</p>
  
  <p>I've included the JSTL1.2.jar, jstl-impl.jar.</p>
  
  <p>I'm really wondering how to get this fixed. The same deployment works perfectly fine on Weblogic server(on PROD environment)</p>
  
  <p>Exception stack trace:</p>
  
  <pre><code>INFO: Starting Servlet Engine: Apache Tomcat/7.0.12
  Feb 10, 2014 6:40:29 PM org.apache.catalina.core.ApplicationContext log
  SEVERE: StandardWrapper.Throwable
  java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/ConditionalTagSupport
      at java.lang.ClassLoader.defineClass1(Native Method)
      at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
      at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
      at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
      at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2818)
      at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1148)
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1643)
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
      at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1223)
      at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1450)
      at org.apache.jasper.compiler.Parser.parse(Parser.java:138)
  </code></pre>