Nginx and/or Passenger failing

[springbok]

Sergey A. Osokin Wrote:
-------------------------------------------------------
> On Tue, Sep 27, 2011 at 05:35:57AM -0400,
> springbok wrote:
> > Ok, I've got passenger loading and appearing in
> the process list, I
> > created a index.html file and was able to
> display it doing a GET / but
> > when I try GET / HTTP/1.0 it just sits there and
> nothing happens. If I
> > remove the index.html I get "Hello world"
> returned, no mention of
> > passenger.
> 
> So, if you got "Hello, <b>world</b> this means
> passenger works well with
> default installation.  Could you please check your
> application or try to use
> previous version of nginx and/or passenger.
> 
> -- 
> Sergey A. Osokin
> osa at FreeBSD.ORG.ru
> osa at FreeBSD.ORG
> 
> _______________________________________________
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> nginx at nginx.org
> http://mailman.nginx.org/mailman/listinfo/nginx

Hi Sergey,

I was using 0.8.53 when I started getting the errors and decided to
upgrade before posting my question.

Do you believe this is an nginx or passenger problem, is nginx causing
passenger to shutdown or the other way around? To me it looks like the
watchdog process is getting an error from nginx and closing the
passenger processes.

We have 8GB of memory and 4 processors, do you think it could be memory
related/CPU load related, I know it's difficult to say without seeing
our app and the load it places on the system, but if you had to guess?
It has plenty of memory available so I don't think that's a problem, the
IT manager for the client which  I developed the app is convinced the
shutdown is caused by CPU load. When monitoring the load the passenger
processes spike up to around 50-80% but settle down to 10% of less when
idling, at the moment they are < 1% as the load is low. The shutdown has
happened when there is not a lot of load so I'm not convinced.

I just really don't know where to start looking, could it be something
external for example the DB the app uses is running on a different
server maybe it's a network problem, what about rogue messages is that
possible, the IT manager did say he removed the firewall to the machine.
I'm sure he has something else in place, but this app has been running
fine for the last 6 months, it only started happening after the weekend
when we went live and the DB was moved from the same machine to
another.

Sorry for all the questions but I'm really stumped and don't know what
to try next.

Thanks again for your help.

Etienne.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,215871,215902#msg-215902