==== Required information ====
- iRedMail version 0.9.5-1
- Linux/BSD distribution name and version:  debian 8.4 jessi
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): Mysql
- Web server (Apache or Nginx): apache
- Manage mail accounts with iRedAdmin-Pro? no
====

During installation i have this:

*************************************************************************
* iRedMail-0.9.5-1 installation and configuration complete.
*************************************************************************

< Question > Would you like to use firewall rules provided by iRedMail?
< Question > File: /etc/default/iptables, with SSHD port: 22. [Y|n]y
[ INFO ] Copy firewall sample rules: /etc/default/iptables.
< Question > Restart firewall now (with SSHD port 22)? [y|N]y
[ INFO ] Restarting firewall ...
[ INFO ] Updating ClamAV database (freshclam), please wait ...
ERROR: /var/log/clamav/freshclam.log is locked by another process
ERROR: Problem with internal logger (UpdateLogFile = /var/log/clamav/freshclam.log).

it is normal?