Problem on cPanel with Centos 7 during create account

[AllenKe]

Hello
We have a problem during create some accounts on the server with CentOS 7.0 !
I got bellow error :
A DNS entry for “DOMAIN” already exists. You must remove this DNS entry from all servers in the DNS cluster to proceed.

after check named.conf I saw bellow characters end of file and this file is damaged !
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^

1. I will create account
2. server's ping will be lost
3. account will not be created
4. I see bellow characters end of named.conf
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^
5. List Account is empty
6. account not be created completely

for solve the problem I should rebuild named.conf , update list account manually and create new account with another user , but my problem is not how can i solve this problem manually , my question is what is problem and why we have same problems on all of our 3 servers with centos 7 ?
please note that we have more than 100 servers and all of them are centos 6 and we've not any problems during creation account

 

[cPanelMichael]

1. I will create account
2. server's ping will be lost

Hello

Do you notice any error messages in /usr/local/cpanel/logs/error_log when creating the account?

Thank you.