<html> <head> </head> <body> The only time nagios will stop doing service checks at the normal_check_interval for that service is if that service has a servicedependency that's execution failure criteria is true. Otherwise, service checks will continue as planned. The way nagios knows that a host has come back up is if any service on that host has recovered to OK. While a host and its services are down, when a service check occurs, it won't go through all the retries (already in a hard state - no need to retry), but it will check the service once, Also, do you have aggressive_host_checking enabled in your nagios.cfg? The only reason I can guess that the host check is also occurring when the service check occurs is that you have that setting enabled. Otherwise a host will only get checked after the first service check failure (when the host is still up). Hope this helps. -Russell Bishop, Dean wrote: <blockquote type="cite" cite="mid:DE220CABCDF9D311B098009027F43AF408334A1D@EXMB01.tcdsb.org"> <title></title> <meta content="MSHTML 6.00.2716.2200" name="GENERATOR"> First, sorry bout the subject i realize that it is inappropriate. it does, however capture my initial response. We are in the midst of many nightmares concurrently: smoking servers, irreplaceable data lost, network latency, cold lunch, sore finger, you know the whole gambut at once. apologies to all. here is another entry from my logs. Each host is dependant on the previously numbered host (e.g. Marshall-McLuhan-0561SW2A_4-HS7 is the parent of Marshall-McLuhan-0561SW2A_5-HS7 who is the parent of Marshall-McLuhan-0561SW2A_6-HS7, etc. <div>why, once Marshall-McLuhan-0561SW2A_14-HS7 is determined to be UNREACHABLE (due to the failure of Marshall-McLuhan-0561SW2A_4-HS7), is the service checked on Marshall-McLuhan-0561SW2A_14-HS7?</div> [1034172479] HOST ALERT: Marshall-McLuhan-0561SW2A_14-HS7;DOWN;SOFT;1;CRITICAL - Plugin timed out after 18 seconds [1034172516] HOST ALERT: Marshall-McLuhan-0561SW2A_7-HS7;DOWN;SOFT;1;CRITICAL - Plugin timed out after 18 seconds [1034172552] HOST ALERT: Marshall-McLuhan-0561SW2A_6-HS7;DOWN;SOFT;1;CRITICAL - Plugin timed out after 18 seconds [1034172588] HOST ALERT: Marshall-McLuhan-0561SW2A_5-HS7;DOWN;SOFT;1;CRITICAL - Plugin timed out after 18 seconds [1034172624] HOST ALERT: Marshall-McLuhan-0561SW2A_4-HS7;DOWN;SOFT;1;CRITICAL - Plugin timed out after 18 seconds [1034172644] HOST ALERT: Marshall-McLuhan-0561SW2A_4-HS7;DOWN;HARD;2;CRITICAL - Plugin timed out after 18 seconds [1034172644] HOST NOTIFICATION: nagiosadmin;Marshall-McLuhan-0561SW2A_4-HS7;DOWN;host-notify-by-email;CRITICAL - Plugin timed out after 18 seconds [1034172645] HOST NOTIFICATION: Marco;Marshall-McLuhan-0561SW2A_4-HS7;DOWN;host-notify-by-email;CRITICAL - Plugin timed out after 18 seconds [1034172645] HOST NOTIFICATION: Kevin-NonCritical;Marshall-McLuhan-0561SW2A_4-HS7;DOWN;notify-by-epager;CRITICAL - Plugin timed out after 18 seconds [1034172645] HOST NOTIFICATION: Kevin;Marshall-McLuhan-0561SW2A_4-HS7;DOWN;host-notify-by-email;CRITICAL - Plugin timed out after 18 seconds [1034172646] HOST NOTIFICATION: Keith-NonCritical;Marshall-McLuhan-0561SW2A_4-HS7;DOWN;notify-by-epager;CRITICAL - Plugin timed out after 18 seconds [1034172646] HOST NOTIFICATION: Keith;Marshall-McLuhan-0561SW2A_4-HS7;DOWN;host-notify-by-email;CRITICAL - Plugin timed out after 18 seconds [1034172646] HOST NOTIFICATION: Ben;Marshall-McLuhan-0561SW2A_4-HS7;DOWN;host-notify-by-email;CRITICAL - Plugin timed out after 18 seconds [1034172647] HOST ALERT: Marshall-McLuhan-0561SW2A_5-HS7;UNREACHABLE;HARD;2;CRITICAL - Plugin timed out after 18 seconds [1034172647] HOST ALERT: Marshall-McLuhan-0561SW2A_6-HS7;UNREACHABLE;HARD;2;CRITICAL - Plugin timed out after 18 seconds [1034172647] HOST ALERT: Marshall-McLuhan-0561SW2A_7-HS7;UNREACHABLE;HARD;2;CRITICAL - Plugin timed out after 18 seconds [1034172647] HOST ALERT: Marshall-McLuhan-0561SW2A_14-HS7;UNREACHABLE;HARD;2;CRITICAL - Plugin timed out after 18 seconds [1034172647] SERVICE ALERT: Marshall-McLuhan-0561SW2A_14-HS7;Port Check-23;CRITICAL;HARD;1;Socket timeout after 10 seconds -----Original Message----- From: Bishop, Dean Sent: Thursday, October 10, 2002 1:04 PM To: '<a class="moz-txt-link-abbreviated" href="mailto:nagios-users@lists.sourceforge.net">nagios-users@lists.sourceforge.net</a>' Subject: What the *&#( !! Importance: High Can someone explain this to me?? why in the world is the service for testserver01.tcdsb.org being checked after the host has been determined down? also why is the host being checked before the service?? [root@NMS var]# tail nagios.log -n 3000 |grep testserver01 [1034266896] HOST ALERT: testserver01.tcdsb.org;UP;HARD;1;(Host assumed to be up) [1034266896] SERVICE ALERT: testserver01.tcdsb.org;Misc Servers - Port Check 135;OK;HARD;1;TCP OK - 0 second response time on port 135 [1034267924] HOST ALERT: testserver01.tcdsb.org;DOWN;SOFT;1;CRITICAL - Plugin timed out after 8 seconds [1034267933] HOST ALERT: testserver01.tcdsb.org;DOWN;HARD;2;CRITICAL - Plugin timed out after 8 seconds [1034267933] HOST NOTIFICATION:nagiosadmin;testserver01.tcdsb.org;DOWN;host-notify-by-email;CRITICAL - Plugin timed out after 8 seconds [1034267934] HOST NOTIFICATION:Keith;testserver01.tcdsb.org;DOWN;host-notify-by-email;CRITICAL - Plugin timed out after 8 seconds [1034267934] SERVICE ALERT: testserver01.tcdsb.org;Misc Servers - Port Check 135;CRITICAL;HARD;1;Socket timeout after 2 seconds [1034268938] HOST ALERT: testserver01.tcdsb.org;UP;HARD;1;PING OK - Packet loss = 0%, RTA = 0.61 ms [1034268938] HOST NOTIFICATION:nagiosadmin;testserver01.tcdsb.org;UP;host-notify-by-email;PING OK - Packet loss = 0%, RTA = 0.61 ms [1034268938] HOST NOTIFICATION:Keith;testserver01.tcdsb.org;UP;host-notify-by-email;PING OK - Packet loss = 0%, RTA = 0.61 ms [1034268938] SERVICE ALERT: testserver01.tcdsb.org;Misc Servers - Port Check 135;OK;HARD;1;TCP OK - 0 second response time on port 135 [root@NMS var]# </blockquote> <pre class="moz-signature" cols="$mailwrapcol">-- Russell Scibetti Quadrix Solutions, Inc. <a class="moz-txt-link-freetext" href="http://www.quadrix.com">http://www.quadrix.com</a> (732) 235-2335, ext. 7038 </pre> </body> </html>