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Why are you writing any messages to the screen? That's the slowest part of your script. I've had scripts end and the output keep printing on the screen for minutes after the script has completed. With the volume you're talking about your 'hang' may come from buffer overflow in the system libraries.
I would change the script to redirecting 'info' to the bit bucket, or the very least to a separate buffered file. Buffering in production is very important, and having 80 processes running, the output on the screen isn't worth much anyway.
Another area of concern is using open and pipe the output. I now use a 'flock' with this technique because of 'hang' situations. That may ruin your concurrency. Why not use 'qx/.../;', since I believe Perl will fork and give you the results back.
This is a large problem, and many, many things could go wrong, but hopefully PM can help you think of alternatives.
"Well done is better than well said." - Benjamin Franklin
In reply to Re: TCP Server hangs with multiple client connections