### URGENT: duplicated servlet output ###

Hi,
I'm usin cos.jar of servlets.com for file uploading. But, sometimes, the output of my servlets are duplicated. This problem doesn't occur everytime even if for the same uploaded files. Also, When I encounter this problem on my desktop, It runs on the other desktops without any problem.
I'm sure that lines of uploaded files are not re-read/re-processed twice immediately. Because, may applications would return errors in that case. But, if entire file is re-read/re-processed, there would not be errors returned.
Here are my configuration:
Browser:Internet Explorer 5.0
OS: Windows 2000 Professional
Servlet Engine: Resin 2.1.9
Please help...This is very important problem. Because, the output of our sevlets are duplicated.
thanks in advance...

Thanks for the reply.
I'm sure this is not a thread synchronization problem.
Here is the doPost():
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
itrprofThread iThread;
iThread = new itrprofThread(request,response);
iThread.start();
try {
iThread.join();
} catch (InterruptedException e) {}
I'm sure that uploaded file is processed twice after the first entire process of the file is finished. Here is the proof:
CORRUPTED LINEs AND THEIR DEPENDENTs (2 of 2)
Errror code Line number Line
itp-05 [2] 99 WAIT #0: nam='SQL*Net message from client' ela= 98956 p1=1413697536 p2=1
itp-05 [2] 353 WAIT #0: nam='SQL*Net message from client' ela= 98956 p1=1413697536 p2=1
As you see above, the lines are the same lines. In fact, it's single line in the uploaded file. But, If you notice the line numbers of the lines, they are different. The first line number is correct. But, the second is wrong. Because, second line is duplicated.
Also, There are 252 lines in the file. But, line number of the second line is reported 353. This is not possible.
I'm now sure that uploaded file in the second phase is processed after the first phase is completed. Because:
Line number in the first phase: 99
Total line number in the file: 252
Line number in the second phase: 353
If I sum 99 and 252, it gives 351. It's proof the entire file is processed twice after the first phase is completed.
is is possible to see the contents of HTML form data before sending to servlet ?
PLEASE HELP, THIS IS VERY IMPORTANT PROBLEM.

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