I found and fixed the problem. The problem was with my applet code that I was using URL constructor without assigning port 8080. It is working fine now. I just edit my code as below.
Original code:
URL logfileURL1 = new URL(documentBase.getProtocol(), documentBase.getHost(), path + "/Total.log");
Corrected code:
URL logfileURL1 = new URL(documentBase.getProtocol(), documentBase.getHost(), 8080, path + "/Total.log");
Thanks
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Roda