Nagios Support Forum

Dear Expert,

i have noticed that once i have reboot my XI server all check went unsync some of them matched with system time and some not...how do i resync all service / host check with latest system clock time ???

due to which i got bulf following messages
"rrdcached[1798]: queue_thread_main: rrd_update_r (/usr/local/nagios/share/perfdata/xx.rrd) failed with status -1. (/usr/local/nagios/share/perfdata/xx.rrd: illegal attempt to update using time 1386052411 when last update time is 1386055426 (minimum one second step))"

my system time was 10:57 am and nagios showing last check time 11:29 how and why ?? how do i avoid such kind of an error in future ...it is leading impact on all my performance graphs data..

Your php time is likely off.. run the following and show the output here:
What timezone are you in?

cat /etc/php.ini
date.timezone = Asia/Kuwait

[root@masterxi1 ~]# date
Wed Dec 4 08:32:13 AST 2013
[root@masterxi1 ~]# clock
Wed 04 Dec 2013 08:32:15 AM AST -0.187803 seconds
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but after reboot date become 1 hr back why ?? my question is how do i re sync all the host/service check is there anyway ?

Are you using ntp or any other service to sync the clocks on your systems?