Re: [monit] Monit fails to create PID file on restart

[Martin Pala]

The pidfile should be created either by the start script or started program 
itself (in this case apache).

Are you sure that your apache instance creates the pidfile /var/run/httpd.pid? 
The pidfile location depends on apache configuration (for example ubuntu uses 
usually /var/run/apache2.pid which can be customized either via apache2.conf 
PidFile statement or apache's envvars file APACHE_PID_FILE variable)


On Jun 24, 2010, at 11:49 AM, Tong Anh Quan wrote:

> Hi,
> 
> Have you solved this problem? Today, the same thing happen to me. My 
> monit.conf:
> 
>   check process apache with pidfile /var/run/httpd.pid
>     start program = "/etc/init.d/httpd start"
>     stop program  = "/etc/init.d/httpd stop"
>     if cpu > 60% for 2 cycles then alert
>     if cpu > 80% for 5 cycles then restart
>     if totalmem > 600.0 MB for 5 cycles then restart
> 
> When the Apache reach the threshold, monit attempts to restart Apache without 
> pid file, therefore it thinks Apache fails to start:
> 
> [ICT Jun 24 12:50:19] error    : 'apache' total mem amount of 647948kB 
> matches resource limit [total mem amount>614402kB]
> [ICT Jun 24 12:50:20] info     : 'apache' trying to restart
> [ICT Jun 24 12:50:20] info     : 'apache' stop: /etc/init.d/httpd
> [ICT Jun 24 12:50:21] info     : 'apache' start: /etc/init.d/httpd
> [ICT Jun 24 12:51:20] error    : 'apache' process is not running
> [ICT Jun 24 12:51:20] error    : 'apache' failed to start
> 
> `pidof httpd` still return the parent and child's PID but there is no 
> httpd.pid in /var/run.
> Additional:
> - monit start with root user
> - there is no error in Apache log
> 
> Can anyone help me to debug this case? Thanks in advance.
> 
> 
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