Another app is currently holding the xtables lock. Perhaps you want to use the -w option?
When i want to reload the OpenSUSE firewall after i have made any change i have to wait ages for it to reload.
I discovered that when i disable the --dynamic and --white parameters for the * * * * * /usr/local/bin/VB-firewall.pl --dynamic --white --flush --quiet cronjob the issue goes away.
So it has to do with the dynamic and white list features. Does anyone have a work-around for this?