Re: Application fails to start.

[jbelant]

Martin Pala wrote:
> Hello,
>
> can you try following steps?
>
> 1.) start your application manualy using your script

I've modified the script based on Jan-Henrik's recommendation. Here is 
the modified script.

case $1 in
  start)
    cd /home/eminer/cA3Server
    echo $$ > /var/run/cA3Server.pid;
    exec /home/eminer/cA3Server/cA3Server > /dev/tty6
  ;;
  stop)
    kill `cat /var/run/cA3Server.pid`
    rm /var/run/cA3Server.pid
  ;;
  *)
    echo "usage: rc.a3server {start|stop}" ;;
esac


> 2.) provide 'ps -ef | grep A3Server'

address@hidden:/home/eminer/cA3Server# ps -ef|grep cA3Server
root     10181  9992  0 10:47 pts/3    00:00:00 
/home/eminer/cA3Server/cA3Server
root     10183  9933  0 10:47 pts/2    00:00:00 grep cA3Server

> 3.) provide 'cat /var/run/cA3Server.pid' output

address@hidden:/home/eminer/cA3Server# cat /var/run/cA3Server.pid
10181

> 4.) start monit in debug mode ... using '-v' option

address@hidden:/home/eminer/bin# monit -v
monit: Debug: Adding net allow '9.8.7.6'.
monit: Debug: Adding net allow '1.2.3.4'.
monit: Debug: Adding host allow 'localhost' (127.0.0.1).
Runtime constants:
 Control file       = /etc/monitrc
 Log file           = /tmp/monitlog
 Pid file           = /var/run/monit.pid
 Debug              = True
 Log                = True
 Use syslog         = False
 Is Daemon          = True
 Use process engine = True
 Poll time          = 120 seconds
 Mail server(s)     = localhost
 Mail from          = (not defined)
 Mail subject       = (not defined)
 Mail message       = (not defined)
 Start monit httpd  = True
 httpd bind address = Any/All
 httpd portnumber   = 443
 httpd signature    = True
 Use ssl encryption = False
 httpd auth. style  = Host/Net allow list
 Alert mail to      = address@hidden
 Alert on           = All events

The service list contains the following entries:

Process Name          = mail
 Group                = (not defined)
 Pid file             = /var/run/sendmail.pid
 Monitoring mode      = active
 Start program        = /etc/rc.d/rc.sendmail start
 Stop program         = /etc/rc.d/rc.sendmail stop
 Pid                  = if changed then alert
 Ppid                 = if changed then alert
 Timeout              = If 2 restart within 3 cycles then unmonitor 
else if recovered then alert

Process Name          = apache
 Group                = (not defined)
 Pid file             = /var/run/httpd.pid
 Monitoring mode      = active
 Start program        = /etc/rc.d/rc.httpd start
 Stop program         = /etc/rc.d/rc.httpd stop
 Pid                  = if changed then alert
 Ppid                 = if changed then alert
 Timeout              = If 2 restart within 3 cycles then unmonitor 
else if recovered then alert

Process Name          = ssh
 Group                = (not defined)
 Pid file             = /var/run/sshd.pid
 Monitoring mode      = active
 Start program        = /etc/rc.d/rc.sshd start
 Stop program         = /etc/rc.d/rc.sshd stop
 Pid                  = if changed then alert
 Ppid                 = if changed then alert
 Timeout              = If 2 restart within 3 cycles then unmonitor 
else if recovered then alert

Process Name          = A3Server
 Group                = (not defined)
 Pid file             = /var/run/cA3Server.pid
 Monitoring mode      = active
 Start program        = /home/eminer/bin/rc.a3server start
 Stop program         = /home/eminer/bin/rc.a3server stop
 Pid                  = if changed then alert
 Ppid                 = if changed then alert
 Timeout              = If 2 restart within 3 cycles then unmonitor 
else if recovered then alert

-------------------------------------------------------------------------------
Starting monit daemon with http interface at [*:443]


> I'm not sure yet where the problem is, but i think it may be either:
>
> - race condition between you startup script pidfile creation section and
>
> monit process start watching thread
>
> - or inconsistency in pidfile and real process pid

My modified script works fine from a command prompt. Monit doesn't like it.

Thanks for your help so far,

Jim