java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException

Question

I'm trying to retrieve the data from the database. When I run the program it shows the error java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException I have the json-lib jar file in my WEB-INF --> lib directory, I don't know why it is showing this error for JSONArray .

My code is :

        StringBuilder sb=new StringBuilder(1024);
        sb.append("select * from ").append(uname.trim()).append("vcomments").append(" where itemid=").append(itemId).append(" and albumid=").append(albumId);
        sql=sb.toString();
        stmt = conn.prepareStatement(sql);
        ResultSet rs = stmt.executeQuery();
        //ArrayList<String> CommArray=new ArrayList();
        JSONArray arrayObj=new JSONArray();                //#100


         while(rs.next()){
            Commenter comment = new Commenter();
            comment.setUname(rs.getString("uname").trim());
            comment.setComment(rs.getString("comments").trim());
            arrayObj.add(comment.toString());

            }    
         commentObj=gson.toJsonTree(arrayObj);
         myObj.add("commentInfo", commentObj);
         out.println(myObj.toString());
         rs.close();                                                              
         stmt.close();                                                            
         stmt = null;                                                             


         conn.close();                                                            
         conn = null;                                                  

     }                 

And the console output is :

 SEVERE: Servlet.service() for servlet [VComment] in context with path [/skypark] threw exception [Servlet execution threw an exception] with root cause
java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2904)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
at skypark.VComment.doGet(VComment.java:100)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:931)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Please anyone tell me how to solve this problem......Thanks....

Answer 1

I had the same Problem and - as you - I downloaded the newest commons-lang. But actually i could solve it by downloading the apache commons-lang 2.6 ( DDL ) and put the jar under WEB-INF/lib

Hopefully you solved it in the meantime.

Answer 2

You are missing the commons-lang jar VERSION 2 (ie not the latest release)

The LATEST commons-lang jar VERSION 3's classes are in the package: org.apache.commons.lang3

While the OLDER commons-lang jar VERSION 2's classes are in the package: org.apache.commons.lang

Answer 3

findjar.com suggests one of several jar files that could be missing. You should have the Apache commons-lang .jar file packaged with your solution. It should be in your .war file that you have deployed, or in your Tomcat lib directory.

If you have it (and you've confirmed that you can instantiatate/reference classes from that .jar in your solution) then perhaps it's a .jar version problem. What version of commons-lang should your JSON lib be referencing ?

Check out the JSON-lib transitive dependencies (scroll down for these)

Answer 4

Using net.sf.json uses the Commons Lang and in the list Brian provided ( http://json-lib.sourceforge.net/dependencies.html ), Commons Lang version 2.5 is specified. net.sf.json is in its current version not compatible with Commons Lang 3. For safety you should use the version specified (2.5) even though we have found that version 2.6 works fine.

The ClassNotFoundException for NestableRuntimeException is an effect of trying to use Commons Lang 3 with net.sf.json.

Since you have the Commons Lang jar in your WEB-INF/lib, all you need to do is to exchange the one you have with version 3 with the Commons Lang 2.5 (or 2.6) jar.

Answer 5

What kind of app engine are you using? I had major problems working with eclipse code engine, but I changed to Apaches Tomcat 7 and just redirected the .xml file to use the one in the app project instead.

Answer 6

Looks like, Its can't find the . 。

Make sure you have the dependecy in WEB-INF --> lib . dependecy。

You find it here http://commons.apache.org/lang/download_lang.cgi