Continuous start of mongrel when PID is missing

[se...@snootymonkey.com]

Hi fellows,

I have an issue that's happened quit a few times and I'm wondering
what might be a better configuration to avoid this issue.

The problem is if one of the mongrels in a cluster starts up and has
no pid file (I know this sounds odd, but it has happened quite a few
times, I don't know why). So all of the mongrels in the cluster start
up fine, but 1 ends up w/o a pid file. god comes along, finds no pid
so tries to start the mongrel instance, it fails because the port is
used and so no pid is written out, this happens over and over as god
discovers the missing pid each time. The end result is that nothing is
ever down, but I get emailed over and over by god saying it's trying
to start one of the mongrels. Here is the relevant extract of my
config:


w.start = "mongrel_rails start -c #{RAILS_ROOT} -p #{port} \
-P #{RAILS_ROOT}/tmp/pids/mongrel.#{port}.pid -e production -d"

# Conditions to start a mongrel
w.start_if do |start|
# If it's not running, start it
start.condition(:process_running) do |c|
c.running = false
c.notify = {:contacts => ['developers'], :priority =>
2, :category => 'god starting mongrel'}
end
end

What's a better way to configure mongrel start to avoid this problem?

Thanks!
Sean

[Aníbal Rojas]

Sean,

Actually your real problem is this weird mongrel behaviour. Not
sure what your application is, but in my case I have switched all my
production boxes to Thin without problem for a long time.

If you want to stick to Mongrel, I think you can modify start,
stop or restart commands, depending how you have built them, to use a
pkill "guard" to assure the misbehaving process is always killed.

Best regards, and Happy New Year

---------------------------------------- ----------------
Aníbal Rojas
http://hasmanydevelopers.com (work)
http://rubycorner.com (community)
http://anibal.rojas.com.ve (personal)

[se...@snootymonkey.com]

Aníbal,

Of course you are right... it is Mongrel's problem, not god's
specifically. I was wondering how to configure god to accommodate the
problem. I like both of your suggestions. I'll look into thin and if I
don't want to go to thin I'll write a pkill guard. Thanks for the
ideas.

Sean

On Dec 27, 10:24 am, "Aníbal Rojas" <anibalro...@gmail.com> wrote:
> Sean,
>
>     Actually your real problem is this weird mongrel behaviour. Not
> sure what your application is, but in my case I have switched all my
> production boxes to Thin without problem for a long time.
>
>     If you want to stick to Mongrel, I think you can modify start,
> stop or restart commands, depending how you have built them, to use a
> pkill "guard" to assure the misbehaving process is always killed.
>
>     Best regards, and Happy New Year
>
> ---------------------------------------- ----------------

> Aníbal Rojashttp://hasmanydevelopers.com(work)http://rubycorner.com               (community)http://anibal.rojas.com.ve         (personal)
>
> On Sun, Dec 28, 2008 at 9:22 AM, s...@snootymonkey.com

[woahdae]

seems like this came up again in this thread:

http://groups.google.com/group/god-rb/browse_thread/thread/0219271ab8fc1902/b4791f8e63eab2ff#b4791f8e63eab2ff

the solution mentioned above is to use mongrel_cluster for its --clean
option (more details in the other post).

And as for blaming mongrel, I wouldn't be so sure. This only happens
for me when I use Gods clean option. I think God is the one that
deletes the pid rather than mongrel not writing one. Though I don't
have anything to back this up except a history of never experiencing
this with mongrel otherwise...

On Dec 29 2008, 4:37 am, "s...@snootymonkey.com"

[se...@snootymonkey.com]

Absolutely if it is god deleting the pid rather than what it appears
like, mongrel never writing the pid, then it's not mongrel's problem.
I haven't gotten around to replacing the mongrel cluster with thin or
passenger yet, so I'll try the suggestion of mongrel_cluster's --
clean.

Thanks!
Sean

On Jan 9, 11:55 am, woahdae <woody.peter...@gmail.com> wrote:
> seems like this came up again in this thread:
>

> http://groups.google.com/group/god-rb/browse_thread/thread/0219271ab8...