This article explains how to fix Munin graphs that wont update or have stopped updating. The official FAQ (http://munin-monitoring.org/wiki/faq#Q.Thegraphsarenotupdatinganymore) doesn’t really say much about it. So do this:
More info: This is an interesting article related to the issue. “http://grokbase.com/t/sf/munin-users/1166b12gsk/increase-in-period-for-munin-cron-or-munin-update-results-no-graphs”.
First, disable munin cron task:
mv /etc/cron.d/munin ~/munin.cron
Wait until all munin tasks have completed by monitoring the logs:
tail -f /var/log/munin/munin*.log
Now remove the lock files:
rm -rf /var/run/munin/*
Next fix ownership and permissions issues. In my example, i’m running munin from “/var/www/html/munin”:
chown munin.munin -R /var/www/html/munin restorecon -Rv /var/www/html/munin
Now we put the cron tasks back in action:
mv ~/munin.cron /etc/cron.d/munin
And wait for the next update and you should start seeing graph updates. Other things to check are those typical for any sys-admin maintenance such as disk space, user permissions, SELinux, etc.