<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7638.1"> <TITLE>Nagios stops working at around midnight</TITLE> </HEAD> <BODY>  Hi, I am running Nagios on a host to monitor bunch of services. I have setup 2 mins as frequency for some of the services. The issue I am facing is that Nagios stops running in timely fashion at around midnight daily (12:00 AM to 02:00 AM) and I do not get timely data for the services I am monitoring. I added a Nagios plugin to take backup for status.log every 5 mins. I found that there is only one copy of status.log saved during 12:00 AM to 01:00 AM, and 2-3 copies between 01:00 am to 2:00 AM . It's behaving correctly as it should for rest of the time and it saves around 12 different copies for status.log each hour. I have setup timeperiod to be 24 Hours A Day, 7 Days A Week. Here is my timeperiod definition: # '24x7' timeperiod definition define timeperiod{ timeperiod_name 24x7 alias 24 Hours A Day, 7 Days A Week sunday 00:00-24:00 monday 00:00-24:00 tuesday 00:00-24:00 wednesday 00:00-24:00 thursday 00:00-24:00 friday 00:00-24:00 saturday 00:00-24:00 } I have no idea what's going on. Any pointers will be highly appreciated! Thanks, Sandeep </BODY> </HTML>