Starman-0.2008_1
Plack-0.9971
Net::Server-0.97

Debian 5
Kernel 2.6.26-2-686
perl, v5.10.0 built for i486-linux-gnu-thread-multi

procfs not installed

How to reproduce:

test.psgi:
-----------------
use strict;
use Plack::Builder;

my $app = sub {
	my $env = shift;

	return [
		200,
		[ 'Content-Type', 'text/plain' ],
		[ 'Hello World!' ],
	];
};

builder {
	$app;
};
-----------------

/usr/local/bin/starman --workers 5 --pid /tmp/test.pid --port 4000 --preload-app --daemonize --user web --group web test.psgi

ps aux | grep starman
web       2750  0.2  0.5   7704  5688 ?        S<s  13:03   0:00 starman master --workers 5 --pid /tmp/test.pid --port 4000 --daemonize --user web --group web test.psgi
web       2751  0.0  0.4   7704  4768 ?        S<   13:03   0:00 starman worker --workers 5 --pid /tmp/test.pid --port 4000 --daemonize --user web --group web test.psgi
web       2752  0.0  0.4   7704  4656 ?        S<   13:03   0:00 starman worker --workers 5 --pid /tmp/test.pid --port 4000 --daemonize --user web --group web test.psgi
web       2753  0.0  0.4   7704  4656 ?        S<   13:03   0:00 starman worker --workers 5 --pid /tmp/test.pid --port 4000 --daemonize --user web --group web test.psgi
web       2754  0.0  0.4   7704  4656 ?        S<   13:03   0:00 starman worker --workers 5 --pid /tmp/test.pid --port 4000 --daemonize --user web --group web test.psgi
web       2755  0.0  0.4   7704  4656 ?        S<   13:03   0:00 starman worker --workers 5 --pid /tmp/test.pid --port 4000 --daemonize --user web --group web test.psgi

kill -HUP 2750

# previous children are all killed
ps aux | grep starman
web       2750  0.1  0.5   7352  5764 ?        S<s  13:03   0:00 starman master
web       2772  0.0  0.0   1836   504 pts/0    S<+  13:05   0:00 grep starman

# wait a few seconds, new children are started, but defunct
ps aux | grep starman
web       2750  0.1  0.5   7352  5772 ?        S<s  13:03   0:00 starman master
web       2797  0.0  0.0      0     0 ?        Z<   13:06   0:00 [starman] <defunct>
web       2798  0.0  0.0      0     0 ?        Z<   13:06   0:00 [starman] <defunct>
web       2799  0.0  0.0      0     0 ?        Z<   13:06   0:00 [starman] <defunct>
web       2800  0.0  0.0      0     0 ?        Z<   13:06   0:00 [starman] <defunct>
web       2801  0.0  0.0      0     0 ?        Z<   13:06   0:00 [starman] <defunct>