Even though it's 5 years+ old, i would like to thank the people in this post,
On CentOS 6.5 this is still a solution. I will however add something that i think some people wonder about, namely "what directory should i change?".
Mar 22 12:18:54 vm-centos64-001 named: dumping master file: tmp-FuZsqAqxbi: open: permission denied
He tries to create a file in his default directory.
If you check where named is creating these files based on the configuration.
Look for this in named.conf
Now we know, that on CentOS 6.5 it stores those files there,
So in my case a chmod g+w on that /var/named/ folder was the solution to solving my "dumping master file: tmp-FuZsqAqxbi: open: permission denied" errors.