WORKAROUND: As this appears to be happening during the update check (http://nagios.sourceforge.net/docs/3_0/configmain.html#check_for_updates), I switched it off on nagios.cfg
check_for_updates=0
After this, I restarted, and it all works fine again (although I get a warning about update checks on the front page).
WORKAROUND: As this appears to be happening during the update check (http:// nagios. sourceforge. net/docs/ 3_0/configmain. html#check_ for_updates), I switched it off on nagios.cfg
check_for_updates=0
After this, I restarted, and it all works fine again (although I get a warning about update checks on the front page).