org.apache.commons.lang.exception.NestableRuntimeException

java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntim
14:56:10.093 WARN!! Error for /butterfly/plugins/zhonghang/UsefulData/save_usefuldata.bsh
java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntimeException
  at java.lang.ClassLoader.defineClass1(Native Method)
  at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
  at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
  at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
  at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:303)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
  at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:316)
  at java.lang.Class.forName0(Native Method)
  at java.lang.Class.forName(Class.java:247)
  at bsh.classpath.ClassManagerImpl.plainClassForName(Unknown Source)
  at bsh.classpath.ClassManagerImpl.classForName(Unknown Source)
  at bsh.NameSpace.classForName(Unknown Source)
  at bsh.NameSpace.getImportedClassImpl(Unknown Source)
  at bsh.NameSpace.getClassImpl(Unknown Source)
  at bsh.NameSpace.getClass(Unknown Source)
  at bsh.Name.toClass(Unknown Source)
  at bsh.BSHAmbiguousName.toClass(Unknown Source)
  at bsh.BSHType.getType(Unknown Source)
  at bsh.BSHTypedVariableDeclaration.eval(Unknown Source)
  at bsh.Interpreter.eval(Unknown Source)
  at bsh.Interpreter.source(Unknown Source)
  at bsh.Interpreter.source(Unknown Source)
  at com.hansky.apps.butterfly.pub.BshServlet.evalScript(BshServlet.java:77)
  at com.hansky.apps.butterfly.pub.BshServlet.service(BshServlet.java:40)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
  at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:358)
  at org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter(WebApplicationHandler.java:380
)
  at com.hansky.apps.butterfly.plugin.PluginFilter.doFilter(PluginFilter.java:73)
  at org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter(WebApplicationHandler.java:372
)
  at com.hansky.apps.butterfly.clientmainform.webhandler.LicenseFilter.doFilter(LicenseFilter.java
:103)
  at org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter(WebApplicationHandler.java:372
)
  at com.hansky.apps.butterfly.clientmainform.webhandler.LoginFilter.doFilter(LoginFilter.java:215
)
  at org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter(WebApplicationHandler.java:372
)
  at com.hansky.apps.butterfly.clientmainform.webhandler.ServerMaintainFilter.doFilter(ServerMaint
ainFilter.java:101)
  at org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter(WebApplicationHandler.java:372
)
  at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:324)
  at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:567)
  at org.mortbay.http.HttpContext.handle(HttpContext.java:1807)
  at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:535)
  at org.mortbay.http.HttpContext.handle(HttpContext.java:1757)