Notification error on nagios 1.2 when sending sms

[Michael Huettig]

Hi everybody,
i have found a notification error on nagios 1.2, when sending sms to cell-phones on a service-escalation.
Please have a little bit time to read my explanation:

We have some groups with three members and some groups with only one member, 
host-escalation works fine to all the groups, which have only one member. 
The first group net-admins-sms has an error in notification, sometimes all users get sms, 
but mostly only two users get sms, sometimes user_a and user_c, sometimes user_b and user_c, 
the 3rd user doesn't get any sms. Restarting nagios1.2 and the nagios-server doesn't resolve the problem

In nagios.log i see, that every user is notified by email and sms. 
Sms-application yaps-server doesn't receive notifications from nagios for all contacts. 

SMS-App is yaps-0.93 which get nagios-notification via a pipe to serialize the parallel outgoing mails. 
It reads the pipe while its not empty and put the notification to a single command to yaps. This works fine!

To verify this problem i installed nagios-test-machine and set one unique cell-phone-number 
for all contacts and started a test which works properly. 
Nagios-Production and Nagios-Test have the same software-environment (SUSE8.1, yaps-0.93, nagios-1.2).
Nagios-Production monitors 320 hosts with 1040 services, Nagios-Test monitors 50 hosts with 240 services. 
nagios.cfg is fine-tuned (max_concurrent_checks=65).

Could anyone understand my problem and give me a hint, to debug and resolve the problem???
If you have any further question, please contact me.

With best regards
Michael

Config-snippets:
================
define contactgroup{
	contactgroup_name	net-admins-sms
	alias				Netz-Admins SMS
	members			user_a-sms, user_b-sms, user_c-sms
	}

define contactgroup{
	contactgroup_name	operating-sms
	alias				Operating SMS
	members			operating-sms
	}

define contactgroup{
	contactgroup_name	chief-sms
	alias				The Chief SMS
	members			chief-sms
	}

example for all contacts:
define contact{
	contact_name				user_a-sms
	alias						Michael Huettig
	service_notification_period	8-23
	host_notification_period		8-23
	service_notification_options	c,r
	host_notification_options		d,u,r
	service_notification_commands	notify-by-email, notify-by-sms
	host_notification_commands	host-notify-by-email, host-notify-by-sms
	email					Michael.Huettig at Medien-Systempartner.de
	pager					017xxxxxxxx
	}

# Hostgroup 'switches' escalation definition
define hostgroupescalation{
	hostgroup_name		Switche
	first_notification			3
	last_notification			0
	contact_groups			net-admins-sms, operating-sms, chief-sms
	notification_interval		15
	}

# 'host-notify-by-sms' command definition
define command{
        command_name    host-notify-by-sms
        command_line    echo "$CONTACTPAGER$" "\"$NOTIFICATIONTYPE$:  $HOSTNAME$ ist $HOSTSTATE$ ($OUTPUT$) $NOTIFICATIONNUMBER$ .te Benachrichtigung: Datum: $DATETIME$\"" > /usr/local/nagios/var/rw/yaps.cmd
        }

The yaps-server:
# Filename:
# ===========
# yaps-server
#
# Beschreibung / Description
# ==========================
#
# liest aus einer Pipe und sendet den
# gelesenen String per SMS
# Dieser Umweg ist notwendig, weil Nagios
# nicht sicherstellen kann, dass mehrfache
# yaps-Kommandos sequentiell ausgefuehrt werden,
# damit es keine Konflikte beim Modemzugriff gibt.
#
# Die Pipe muss angelegt sein mittels
# mkfifo /usr/local/nagios/var/rw/yaps.cmd
#
# English
# -------
#
# this script reads a pipe and sends the
# string as a SMS
# This work around is necessary because
# Nagios can't make sure that yaps commands
# are processed sequential. Otherwise there
# is a conflict by accessing the device.
#
# You need to create the pipe your self.
# mkfifo /usr/local/nagios/var/rw/yaps.cmd
#
PIPE=/usr/local/nagios/var/rw/yaps.cmd
LOGFILE=/var/log/yaps-server.log
FNAME=/tmp/yaps.$$

test -p $PIPE || exit 1

while true; do
  read command < $PIPE
  echo "$command" > $FNAME
  if [ -s $FNAME ]; then
    /usr/bin/yaps -t -z $FNAME >>$LOGFILE && rm $FNAME
  else
    echo "No data in file" >> $LOGFILE
  fi
done;
_____________________________________________ end of yaps-server


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