Servlet works in windows but does not work in solaris?

Question

hi all,
can someone tell me why the servlet work in windows platform but doesnt work in solaris?The servlet tries to ping 127.0.0.1 and the output is correct in windows, but when i try it in solaris, it produces the following exception :
Internal error: Unexpected Java exception thrown ( unknown exception, no description ) , stack:java.lang.NoClassDefFoundError: StreamGobbler
at java.lang.Class.getDeclaredConstructors()(Native Method) ....
The code is as follow:
import java.util.*;
import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;
class StreamGobbler extends Thread
     InputStream is=null;
     String type=null;
     PrintWriter out=null;
     StreamGobbler(InputStream is,String type,PrintWriter out)
     this.is=is;
     this.type=type;
     this.out=out;
     public void run()
          try
          InputStreamReader isr=new InputStreamReader(is);
          BufferedReader br=new BufferedReader(isr);
          System.out.println("finishing inputstreamReader and BufferedReader");
          String line=null;
          while (     (line=br.readLine())!=null )
               {     out.println(type+"> "+line);
                    out.println("<br>");          
          catch (IOException ioe)
          {     ioe.printStackTrace();
public class ping extends HttpServlet
     public void init(ServletConfig config) throws ServletException
     {     super.init();
     public void service(HttpServletRequest req,HttpServletResponse res) throws ServletException, IOException
          res.setContentType("text/html");
          PrintWriter out=res.getWriter();
     try     {
          Runtime rt=Runtime.getRuntime();
          System.out.println("pinging 127.0.0.1");
          String[] cmd={"ping","127.0.0.1"};
          Process proc=rt.exec(cmd);
          System.out.println("finishing process proc=rt.exec(cmd)");
          StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(),"ERROR",out);
          StreamGobbler outputGobbler= new StreamGobbler(proc.getInputStream(),"OUTPUT",out);
          errorGobbler.start();
          outputGobbler.start();
          int exitVal=proc.waitFor();
          out.println("Process exitValue: "+exitVal);
          out.close();
     catch (Throwable t)
               t.printStackTrace();
Thanks for help.

Answer 1

java.lang.NoClassDefFoundError: StreamGobblerBecause you didn't put that class into the classpath of the servlet you are trying to run on Solaris.