[svlug] Why script not run correctly as a service

[Tomer]

Hi All,
A question for the bash/Linux experts out there. I have a script shown below
that ensures that tomcat on port 8081 is always running. I noticed that when
running this as a service (by putting a link to it in /etc/init.d and adding
it using chkconfig) it does run when the system reboots, however, when
tomcat goes down, it does not restart it (the TOMCATSTART command does
nothing)
HOWEVER, if running this script from root login as 

nohup  ymca_watchdog.sh &

It DOES restart tomcat when it goes down. Specifically, I noticed that if I
reboot the machine and let the service run it does nothing when tomcat is
down. However, if I start the script manually /etc/init.d/ymca_watchdog.sh
and then logout it works ok. 

What is the difference between these two run methods that cause it not to
work in one and do work in the other? Here is the script below:

=====================================

#!/bin/bash

PGMDIR="/root/watchdog"
TOMCATSTART="/root/tomcattools/tmcatstrt2.sh"
TOMCATSTOP="/root/tomcattools/tmcatstp2.sh"
WPORT=8081
if [ ! -d $PGMDIR ]; then
        mkdir "$PGMDIR"
fi
while true; do
        echo "$(date): Checking HTTP on port $WPORT..." >> "$PGMDIR/log.txt"
        if wget -q -nc localhost:$WPORT ; then
                echo "$(date): ymca watchdog - all good" >>"$PGMDIR/log.txt"
        else
                $TOMCATSTOP
                sleep 2
                $TOMCATSTART
                echo "$(date): attempted to restart tomcat" >>
"$PGMDIR/log.txt"
        fi
        echo "$(date): Sleeping for 2 minutes..." >> "$PGMDIR/log.txt"
        sleep 120
done

AND HERE IS /root/tomcattools/tmcatstrt2.sh :

#!/bin/sh
JAVA_HOME=/usr/local/jdk
export JAVA_HOME
/usr/local/tomcat2/bin/startup.sh


-----Original Message-----
From: svlug-bounces+tomer=pacbell.net at lists.svlug.org
[mailto:svlug-bounces+tomer=pacbell.net at lists.svlug.org] On Behalf Of
svlug-request at lists.svlug.org
Sent: Saturday, September 20, 2008 12:00 PM
To: svlug at lists.svlug.org
Subject: svlug Digest, Vol 337, Issue 25

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