got similar problem today
found these similar problem links:
http://lists.wald.intevation.org/pip...ly/008222.html
https://bugs.kali.org/view.php?id=2591
no solution found
tried grid's solution, reboot, openvas-feed-update, not works.
finally, solved by clear openvas data in redis:
Code:
root@kali:/etc/openvas# redis-cli -s /var/lib/redis/redis.sock
redis /var/lib/redis/redis.sock> keys *
1) "OpenVAS.__GlobalDBIndex"
redis /var/lib/redis/redis.sock> del OpenVAS.__GlobalDBIndex
(integer) 1
then restart openvas scanner
warning: this seems completely removed all my openvas scans, results, targets, scan configs, and the user admin itself is also removed