I'm working on some Jmeter scripts, everything seems to work just fine; they got recorded and run properly (for a couple of users anyway).
The problem appears when I run the scripts for more than 50-60 users. In that case, the script runs, the listeners show me results and according the threads are finishing, they go to sleep, until the last 10% of them. At that point, the threads just hang and never stop. I don't see more results in the listeners, I don't receive any error or warning (neither on a dialog nor in the log panel).
A script based on: 1) enter mainpage; 2) click on a link; 3) waits for load; 4) stop recording after page stop loading. Added some listeners (Tree view, Table and Summary report). Then, the script is run for one and 10 users/threads (launched at the same time), to check integrity. Everything works fine. The script is saved, the listeners cleaned up.
The "real test" is meant to be run for, let's say, 100 users (the idea is go up to 500 users in the next stages of the project). The script is launched, listeners collect data, log panel shows me the threads' transactions, some of the threads start to finish. But, the last 10-15 threads never stop (in average, 10% of the original number of launched threads). I wait, literally for 2 hours and nothing happens.
I tried on two computers, an Intel Core 2 Duo at 1.7GHz with 2GB of RAM, and then I tested on my main rig (Phenom X4 965, 4GB RAM), both with Windows 7 Pro. I run a third time on my notebook using Debian, Intel Pentium dual core at 2GHz, 4GB. In the three machines the exact same thing happens. It's something that doesn't happen for major sites (let's say, Wikipedia, NY.com).
So, everythings point to a server problem, but what could be happening? And why Jmeter doesn't inform me about the situation (it just hangs, nothing more happen)?
Thanks in advance.