Nginx and/or Passenger failing

[Sergey A. Osokin]

On Tue, Sep 27, 2011 at 10:03:30AM -0400, springbok wrote:
> 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
> > 
> > _______________________________________________
> > nginx mailing list
> > 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?

I don't know.

> To me it looks like the
> watchdog process is getting an error from nginx and closing the
> passenger processes.

I think you should ask about your problem authors of passenger at first.

> 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.

-- 
Sergey A. Osokin
osa at FreeBSD.ORG
osa at FreeBSD.ORG.ru