<!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 drops service checks when executing a host event handler?</TITLE> </HEAD> <BODY>  Hi, i have a strange problem i quite don't understand to handle. Question: Is Nagios dropping service checks when executing a host event handler? Situation: 1. We are monitoring 85 Windows Servers with about 630 service checks being performed. check_ping is being run on all servers. 2. Any and all performance data is being passed to a custom shell script. Among others, this script is writing the performance data to a text file 3. The text file containing the performance data is then passed to our data warehouse in order to generate reports. Problem: Per day, there are about 150 checks (Ping) NOT being executed at all. When checking our external text file, i see (example here) that a check at 16:23 is missing. Actually, it seems like check_ping at 16:23 was not executed on ANY host at all. 02-19-2007 16:21:18#SRVDE050#Ping#OK#PING OK - Packet loss = 0%, RTA = 4.24 ms# SRVDE050#02-19-2007 16:21:18#Ping#PING OK - Packet loss = 0%, RTA = 4.24 ms 02-19-2007 16:22:18#SRVDE050#Ping#OK#PING OK - Packet loss = 0%, RTA = 1.21 ms# SRVDE050#02-19-2007 16:22:18#Ping#PING OK - Packet loss = 0%, RTA = 1.21 ms 02-19-2007 16:24:45#SRVDE050#Ping#OK#PING OK - Packet loss = 0%, RTA = 7.24 ms# SRVDE050#02-19-2007 16:24:45#Ping#PING OK - Packet loss = 0%, RTA = 7.24 ms Problem source could be: When checking nagios.log, i see that a host event handler was being executed at that time. Workflow: 1. check_ping reports a problem (host down, for example) 2. nagios executes the configured host event handler This is the point where it seems to me, that ANY check related to the same check_command (here: check_ping) are being dropped at that time. Maybe i am missing something here...? We use Nagios 2.6. Any help is appreciated. Kind regards, Andreas <h6 style="font-family:Verdana,Arial,sans-serif;font-weight:normal"> <hr>Atos Origin GmbH, Theodor-Althoff-Straße 47, D-45133 Essen, Postfach 100 123, D-45001 Essen Telefon: +49 201 4305 0, Fax: +49 201 4305 689095, <a href="http://www.atosorigin.de/">www.atosorigin.de</a> Dresdner Bank AG, Hamburg: Kto. 0954411200, BLZ 200 800 00, Swift Code DRESDEFF200, IBAN DE69200800000954411200 Geschäftsführer: Dominique Illien, Handelsregister Essen HRB 19354, Ust.-ID.-Nr.: DE147861238 <hr> </h6> </BODY> </HTML>