Puppet users - Dec 2010 - dependency loops ???

I have a dependency loop reported but I can not see how this can be:

class monitor  {

   class pulledpork ( $master) {
       exec {
          "/home/snort/bin/pulledpork -nc conf/$master/pp.conf":
          cwd => "/home/snort",
          subscribe => [File["/home/snort/conf/$master/pp"], File[
"/
home/snort/Rules/$master"] ],
          notify => Service["snort.$master"],
          user => "snort";
      }

    }

   define snort($master) {
      service{
        "snort.$master":
            start => "/home/snort/bin/restart-snort -start $master"
,
             ..............
            ensure => running,
            require => Package[''snort''],
        }
   }


  define sensor ( $name, $master, $instance, $rule_categories ) {

   snort{ "snort.$master": master => $master }
   class { pulledpork: stage => post, master => $master }

  < snip>

}

and I get:

err: Could not apply complete catalog: Found dependency cycles in the
following relationships:
Exec[/home/snort/bin/pulledpork -nc conf/dmzo/pp.conf] =>
Service[snort.dmzo],
Service[snort.dmzo] => Exec[/home/snort/bin/pulledpork -nc conf/dmzo/
pp.conf]; try using the ''--graph'' option and open the
''.dot'' files in
OmniGraffle or GraphViz

I can not see how this dependence goes both ways???

What I want to have happen is that when Pulledpork is run then snort
is restarted.

clearly I''m missing something.

Russell

PS how does one use the graph option?  could not find it in the man
pages...

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On Tue, Dec 07, 2010 at 12:56:47PM -0800, russell.fulton
wrote:
>    class pulledpork ( $master) {
>        exec {
>           "/home/snort/bin/pulledpork -nc conf/$master/pp.conf":
>           cwd => "/home/snort",
>           subscribe => [File["/home/snort/conf/$master/pp"],
File[ "/
> home/snort/Rules/$master"] ],
>           notify => Service["snort.$master"],
>           user => "snort";
>       }
> 
>     }
exec must run before service resource, because you specified a notify.
I think puppet will add a dependency here to prevent one resource to be
evaluated twice (e.g. start service, running exec, restart service)
>    snort{ "snort.$master": master => $master }
>    class { pulledpork: stage => post, master => $master }
You want pulledpork to run in stage post, so after service snort. Here
you are: loop

-Stefan