Hi, I'm running freeradius 3.17. I'm using the exec module, which calls a python script. A zombie process is always left after the script terminates. That zombie process "lives" until the script is run again, no matter how long the interval is between two script runs. So no big deal, only one zombie process. But still it shouldn't be that way, so I thought I'd report it. Perhaps I'm missing something? Exec is configured like this: exec execaf { wait = no input_pairs = request shell_escape = yes timeout = 10 program = /usr/local/etc/raddb/eventfoo/eventfoo.py } It is called from the accounting {} section of the default site. The python script always calls sys.exit(0), returning success. This is the relevant htop output: 30478 freeradiu 23 0 62856 39520 S 0.0 1.0 0:02.80 ├─ /usr/local/sbin/radiusd 73486 freeradiu 73 0 0 0 Z 0.0 0.0 0:00.43 │ └─ python3.6 /usr/local/etc/raddb/eventfoo/eventfoo.py Thanks, HC