spams systemd-logind dans log

Dans /var/log/auth.log apparaît trop de messages "Session supprimée"

Jun 2 17:42:39 srv-1 systemd-logind[13785]: Removed session c36006. Jun 2 17:42:39 srv-1 systemd-logind[13785]: Removed session c36007. Jun 2 17:42:40 srv-1 systemd-logind[13785]: Removed session c36008. Jun 2 17:42:41 srv-1 systemd-logind[13785]: Removed session c36009. Jun 2 17:42:41 srv-1 systemd-logind[13785]: Removed session c36010. Jun 2 17:42:41 srv-1 systemd-logind[13785]: Removed session c36011. Jun 2 17:42:42 srv-1 systemd-logind[13785]: Removed session c36012. Jun 2 17:42:43 srv-1 systemd-logind[13785]: Removed session c36013. Jun 2 17:42:43 srv-1 systemd-logind[13785]: Removed session c36014. Jun 2 17:42:43 srv-1 systemd-logind[13785]: Removed session c36015. Jun 2 17:42:44 srv-1 systemd-logind[13785]: Removed session c36016. Jun 2 17:42:45 srv-1 systemd-logind[13785]: Removed session c36017. Jun 2 17:42:45 srv-1 systemd-logind[13785]: Removed session c36018. Jun 2 17:42:46 srv-1 systemd-logind[13785]: Removed session c36019. Jun 2 17:42:47 srv-1 systemd-logind[13785]: Removed session c36020. Jun 2 17:42:48 srv-1 systemd-logind[13785]: Removed session c36021. 

et aucun message sur la nouvelle session, je ne comprends pas ce qui cause ce problème

uname -a:

 Linux backup-01 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux 

lsb_release -a:

 No LSB modules are available. Dissortingbutor ID: Ubuntu Description: Ubuntu 14.04.4 LTS Release: 14.04 Codename: trusty 

J'ai trouvé que cela provoquait par la command 'service zabbix-agent start', si je démarre l'agent zabbix via '/etc/init.d/zabbix-agent start', tout ce qui n'arrive pas

 echo 'if ($programname == "systemd" or $programname == "systemd-logind") and ($msg contains "Starting Session" or $msg contains "Started Session" or $msg contains "Created slice" or $msg contains "Starting user-" or $msg contains "New session" or $msg contains "Removed session") then stop'>/etc/rsyslog.d/ignore-systemd-session.conf systemctl restart rsyslog 

exécutez-le dans la console pour créer un file avec les parameters pour arrêter le spam