Named / Bind consumindo 100% de CPU

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"named" process is using 100% CPU on RedHat/CentOS

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Symptom:

After installing the Men & Mice DNS Server Controller on RedHat Enterprise Linux (or CentOS), the BIND DNS server process is using 100% CPU time.

The logfile contains this error messages:

04-Sep-2012 11:37:55.227 set up managed keys zone for view _default, file 'dynamic/managed-keys.bind'

[ ... empty zones ... ]

04-Sep-2012 11:37:55.262 zone localhost.localdomain/IN: loaded serial 0

04-Sep-2012 11:37:55.264 zone localhost/IN: loaded serial 0

04-Sep-2012 11:37:55.267 dynamic/managed-keys.bind.jnl: create: file not found

04-Sep-2012 11:37:55.267 managed-keys-zone ./IN: sync_keyzone:dns_journal_open -> unexpected error

Versions: we have seen this issue on RedHat / CentOS 6.x with BIND 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6_3.2

Problem:

RedHat has patched the BIND DNS Server to store the DNSSEC managed keys inside a sub-directory "dynamic" under the DNS servers

home directory "/var/named". This sub-directory might not exist.

Solution

create the missing sub-directory, and restart the BIND DNS Server:

sudo mkdir -p /var/named/dynamic
 
sudo chown -R named:named /var/named
 
sudo /etc/init.d/named restart

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