jsp - Getting while using displaytag lib java.lang.NoClassDefFoundError: org/apache/commons/lang/UnhandledException -

The following exception is being used in displaytag-1.2 jar. I have Web-INF / all necessary library Lib folder I

  javax.servlet.ServletException: java.lang.NoClassDefFoundError: Servlet.service (for servlet jsp): org / Apache Commons / lang / UnhandledException org.apache.catalina.core.ApplicationDispatcher serious call org.apache.catalina.loader.WebappClassLoader.loadClass (WebappClassLoader on org.apache.commons.lang.UnhandledException org.apache.catalina.loader.WebappClassLoader.loadClass ( WebappClassLoader.java:1680): thrown exception java.lang.ClassNotFoundException. Java: 1526) java on java.lang.Class.privateGetDeclaredConstructors on java.lang.Class.getConstructor0 (unknown source) at java.lang.Class.newInstance0. Lang.Class.getDeclaredConstructors0 (native resident Respect) to (Unknown Source) (unknown. Java.beans.Introspector.findExplicitBeanInfo (Unknown Source) JavaklangkClassknewInstance (Unknown Source java.beans.Introspector.instantiate On java.beans.Introspector & lt) (Source at unknown source); Init & gt; (Unknown source) at java.beans.Introspector.getBeanInfo (unknown source) org.apache.ja at sper.compiler.Generator $ TagHandlerInfo. & Lt; Init & gt; (Generator.java:3909) or    
  
 I have the same issue Displetag Commons -Long-3 seems to be incompatible with X. Using the Commons Lang 2.6 should fix the problem.