I'm using freeradius 1.0.4 now. Note this problem doesn't persist in my old 1.0.2 installation.

I wan to run external script when Acct-Stop packets received. My acct_users file:

DEFAULT Acct-Status-Type == Stop Exec-Program = "/usr/local/sbin/testacct.php"

Script runs and executes normally but stays in <defunct> state for every call:

5154 ? Z 0:00 [testacct.php <defunct>] 5159 ? Z 0:00 [testacct.php <defunct>] 5161 ? Z 0:00 [testacct.php <defunct>] ......

Where is the mistake can be?

This is a known problem for versions before 1.0.3. If you've not upgraded to 1.0.4, please do so, and try it again.