Date: Sat, 7 Jan 2012 17:05:11 +0400 From: Yuri Pankov <yuri.pankov@gmail.com> To: Kaya Saman <kayasaman@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Having problems running shell script from crontab Message-ID: <20120107130511.GE1237@procyon.xvoid.org> In-Reply-To: <4F0838DF.40006@gmail.com> References: <4F0838DF.40006@gmail.com>
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On Sat, Jan 07, 2012 at 02:21:51PM +0200, Kaya Saman wrote: > Hi, > > I wrote a shell script to detect if the port of tomcat was in use or not > then restart if the port wasn't online; due to tomcat segfaulting as my > system hasn't got enough memory for it. > > > This is the shell script: > > > #!/usr/local/bin/bash > ntstat=`netstat -ap tcp | grep 8180 | sed -n '1p'` sockstat would be more useful here. > port="8180" > > #echo $ntstat > #echo $port > > if [[ $ntstat =~ $port ]]; then > echo "Output of Netstat command $ntstat port number $port" > > /root/java_restart/java_restart.log; > else > wait 60; /usr/local/etc/rc.d/tomcat6 restart; Are you sure you want 'wait' here (or should it be 'sleep')? > fi > > > > Here in /var/log/cron - it can be seen that the script has been executed: > > Jan 7 10:30:00 wiki /usr/sbin/cron[19509]: (root) CMD > (/root/java_restart/java_restart.sh) > Jan 7 11:00:00 wiki /usr/sbin/cron[20418]: (root) CMD > (/root/java_restart/java_restart.sh) > Jan 7 11:30:00 wiki /usr/sbin/cron[21356]: (root) CMD > (/root/java_restart/java_restart.sh) > Jan 7 12:00:00 wiki /usr/sbin/cron[22455]: (root) CMD > (/root/java_restart/java_restart.sh) > > > > > The strange thing is that if I run this script manually > /root/java_restart/java_restart.sh it works fine and does what it's > supposed to do. Cron however seems to execute the IF statement but not > get as far as else??? - it seems as tomcat doesn't restart. > > Here is my little log file that tells the port is active: > > -rw-r--r-- 1 root wheel 116 Jan 7 11:30 java_restart.log > > > If I stop tomcat just before the xx:00 or xx:30 time designations tomcat > will not be restarted by the script and I don't understand why? > > > This is the crontab: 0,30 * * * * /root/java_restart/java_restart.sh Try changing it to /usr/local/bin/bash /root/java_restart/java_restart.sh. > which is being run as root user. > > > Can anyone suggest anything that might be a possible cause for tomcat > not getting restarted automatically when the proper conditions are met? Yuri
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