How to automatically restart Tomcat7 on system reboots?

Question

I have installed Tomcat 7 on Ubuntu 12.04 LTS which runs on an Amzon EC2 instance. Now I wish tomcat should restart automatically on system reboot.

I read this blog which suggest adding below script to /etc/init.d/tomcat7:

# Tomcat auto-start
#
# description: Auto-starts tomcat
# processname: tomcat
# pidfile: /var/run/tomcat.pid

case $1 in
start)
sh /usr/share/tomcat7/bin/startup.sh
;;
stop) 
sh /usr/share/tomcat7/bin/shutdown.sh
;;
restart)
sh /usr/share/tomcat7/bin/shutdown.sh
sh /usr/share/tomcat7/bin/startup.sh
;;
esac 
exit 0

and issue the following commands:

sudo chmod 755 /etc/init.d/tomcat7

sudo ln -s /etc/init.d/tomcat7 /etc/rc1.d/K99tomcat

sudo ln -s /etc/init.d/tomcat7 /etc/rc2.d/S99tomcat

sudo /etc/init.d/tomcat7 restart

My Questions

The tomcat7 already has script in it, where do we have to paste the suggested script?
Is the suggested procedure correct?

Marcin Kaminski · Accepted Answer · 2014-08-16T01:05:48.260

52

Create the init script in /etc/init.d/tomcat7 with the contents as per below (your script should work too but I think this one adheres more closely to the standards).

This way Tomcat will start only after network interfaces have been configured.

Init script contents:

#!/bin/bash

### BEGIN INIT INFO
# Provides:        tomcat7
# Required-Start:  $network
# Required-Stop:   $network
# Default-Start:   2 3 4 5
# Default-Stop:    0 1 6
# Short-Description: Start/Stop Tomcat server
### END INIT INFO

PATH=/sbin:/bin:/usr/sbin:/usr/bin

start() {
 sh /usr/share/tomcat7/bin/startup.sh
}

stop() {
 sh /usr/share/tomcat7/bin/shutdown.sh
}

case $1 in
  start|stop) $1;;
  restart) stop; start;;
  *) echo "Run as $0 <start|stop|restart>"; exit 1;;
esac

Change its permissions and add the correct symlinks automatically:

chmod 755 /etc/init.d/tomcat7
update-rc.d tomcat7 defaults

And from now on it will be automatically started and shut down upon entering the appropriate runlevels. You can also control it with service tomcat7 <stop|start|restart>

edited Aug 16 '14 at 01:05

answered Dec 01 '12 at 22:01

Marcin Kaminski

4,941

1

Thanks. I am new to Ubuntu. What is the meaning when you say " you Tomcat will start only after network interfaces have been configured." What is the meaning of "network interfaces?" What is the meaning of "upon entering the appropriate run level"? and the file tomcat7 already has lot of script in it where should I add the script suggested by you. – Gaurav Agarwal Dec 06 '12 at 21:00
The init scripts under /etc/init.d can be dependent on each other, such as in this case: tomcat7 script won't be run before the network scripts are run.
Could you look up 'runlevels' and 'network interface' terms on google? I'm happy to help with other things but not so much with Googling trivial stuff for others.

And about the other question: my script is meant to replace /etc/init.d/tomcat7.
– Marcin Kaminski Dec 07 '12 at 00:54
The /etc/init.d/tomcat7 in my system is similar to the file here https://gist.github.com/942150. Should I remove all the content from the file and paste your script or paste it at some place in the already written script. – Gaurav Agarwal Dec 07 '12 at 11:56
I haven't seen the script you just referenced. It looks sane and it looks like it replaces the startup/shutdown scripts that come with Tomcat. My version is merely using them. Have you tested those scripts and confirm they work? If so, you can go ahead and use my script.
Use whichever you like, the important thing is to understand what the script does when you paste it.
– Marcin Kaminski Dec 07 '12 at 14:23
I used the script above, but it causes an error as follows: OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "http-bio-443-exec-7". – Dec 16 '14 at 15:21
1

I doubt the shell script above could ever cause such an error. Please do some troubleshooting first. – Marcin Kaminski Dec 16 '14 at 21:03

score 3 · Answer 2 · edited Mar 10 '16 at 13:16

3

Cant this be added to the /etc/rc.local

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

sleep 10
/usr/share/tomcat7/bin/startup.sh

edited Mar 10 '16 at 13:16

Max Alibaev

462

answered Dec 01 '12 at 22:09

penner

591
1
8
15

4

At least the person that downvoted you, should explain why. We all not know all about Linux, and it would be nice to learn why you should not do this. – Edenshaw Aug 09 '16 at 15:21

score 3 · Answer 3 · edited Mar 10 '16 at 12:59

#!/bin/bash
#
# Author : subz
# Copyright (c) 2k15
#
# Make kill the tomcat process
#
TOMCAT_HOME=/media/subin/works/Applications/apache-tomcat-7.0.57
SHUTDOWN_WAIT=5

tomcat_pid() {
  echo `ps aux | grep org.apache.catalina.startup.Bootstrap | grep -v grep | awk '{ print $2 }'`
}

start() {
  pid=$(tomcat_pid)
  if [ -n "$pid" ] 
  then
    echo "Tomcat is already running (pid: $pid)"
  else
    # Start tomcat
    echo "Starting tomcat"
    /bin/sh $TOMCAT_HOME/bin/startup.sh
  fi


  return 0
}

stop() {
  pid=$(tomcat_pid)
  if [ -n "$pid" ]
  then
    echo "Stoping Tomcat"
    /bin/sh $TOMCAT_HOME/bin/shutdown.sh

    let kwait=$SHUTDOWN_WAIT
    count=0;
    until [ `ps -p $pid | grep -c $pid` = '0' ] || [ $count -gt $kwait ]
    do
      echo -n -e "\nwaiting for processes to exit";
      sleep 1
      let count=$count+1;
    done

    if [ $count -gt $kwait ]; then
      echo -n -e "\nkilling processes which didn't stop after $SHUTDOWN_WAIT seconds"
      kill -9 $pid
      echo  " \nprocess killed manually"
    fi
  else
    echo "Tomcat is not running"
  fi

  return 0
}
pid=$(tomcat_pid)

 if [ -n "$pid" ]
  then
    echo "Tomcat is running with pid: $pid"
    stop
  else
    echo "Tomcat is not running"
    start
  fi
exit 0

above shell script check for tomacat is running or not if its running kill the process .if tomcat is not running it will start again add this script as a start up script — SUBZ, May 13 '15 at 05:13

score 2 · Answer 4 · answered May 20 '17 at 17:01

2

Digital Ocean provides a very handy guide for using Tomcat 8.x and Ubuntu 16.04 LTS and systemd scripts.

https://www.digitalocean.com/community/tutorials/how-to-install-apache-tomcat-8-on-ubuntu-16-04

answered May 20 '17 at 17:01

rjha94

121
3

score 0 · Answer 5 · answered Jan 17 '20 at 12:03

0

I tried the accepted answer, which did not work.

What ended up working was to remove the service, and add the service back:

sudo update-rc.d -f tomcat7 remove
sudo update-rc.d tomcat7 defaults

answered Jan 17 '20 at 12:03

mitchus

207

score 0 · Answer 6 · edited Dec 02 '12 at 01:03

0

apache tomcat does not ship any init script with it.

Install the prepackaged version maintained by Ubuntu from the Ubuntu package manager this version ships its own init script.
Follow the steps in the blog you refered to which provide you with a kickstart init script.

edited Dec 02 '12 at 01:03

Eric Carvalho

55,573

answered Dec 01 '12 at 21:43

Yassine Elassad

1

How to automatically restart Tomcat7 on system reboots?

6 Answers6