[undertow-dev] occasional 502 from Apache HTTP Proxy

[Edgar Espina]

Done, but makes no difference. Still got the 502 random errors :S

On Sun, Jan 18, 2015 at 11:13 PM, Stuart Douglas <sdouglas at redhat.com>
wrote:

> I had a play around with apache locally, and I could reproduce this in
> some circumstances, and it looks like we are not setting a high enough
> backlog by default.
>
> Can you try adding:
>
> undertow.setSocketOption(Options.BACKLOG, 1000)
>
> To your Undertow builder? I am going to increase this in our default
> config upstream.
>
> Hopefully this is the issue that you are running into.
>
> Stuart
>
>
> ----- Original Message -----
> > From: "Edgar Espina" <espina.edgar at gmail.com>
> > To: "Stuart Douglas" <sdouglas at redhat.com>
> > Cc: undertow-dev at lists.jboss.org
> > Sent: Monday, 19 January, 2015 12:10:16 PM
> > Subject: Re: [undertow-dev] occasional 502 from Apache HTTP Proxy
> >
> > It is a default undertow instance with a HTTP listener, just set work
> > threads to 200. Is there a default idle timeout? I can' tell from javadoc
> > and looking at the code.
> >
> >
> > On Sun, Jan 18, 2015 at 9:59 PM, Stuart Douglas <sdouglas at redhat.com>
> wrote:
> >
> > >
> > >
> > > Edgar Espina wrote:
> > >
> > >> I'm not, channel does it.
> > >>
> > >> Problem is present on both. For example, home page has a
> content-length
> > >> header but jquery.js use chunked.
> > >>
> > >
> > > In general if you are serving static resources you are better off
> setting
> > > the content length (slightly more efficient, and the browser can
> display
> > > progress on downloads).
> > >
> > >
> > >> Do I have to call .endExchange? or closing the output stream is
> enough?
> > >>
> > >
> > > Closing the output stream is enough. endExchange is automatically
> called
> > > once the call stack returns anyway, unless you have dispatched the
> exchange
> > > or started async IO.
> > >
> > > The 'connection reset by peer' error in the apache log while reading
> the
> > > status like kinda indicates that the request does not even get to this
> > > point anyway, and the underlying TCP connection is probably being torn
> down
> > > somehow.
> > >
> > > Do you have any kind of timeouts set? If you have an idle timeout set
> on
> > > the listener there is a race where Undertow can close the channel due
> to
> > > inactivity just as the front end starts to send a request.
> > >
> > > Stuart
> > >
> > >
> > >> Thanks
> > >>
> > >> On Sun, Jan 18, 2015 at 9:48 PM, Stuart Douglas <sdouglas at redhat.com
> > >> <mailto:sdouglas at redhat.com>> wrote:
> > >>
> > >>     Another question, are you setting a content length on the
> responses?
> > >>     If not the channel will automatically set one if the response fits
> > >>     inside a buffer, otherwise chunked encoding will be used.
> > >>
> > >>     It might be helpful to know if this only happens on chunked, fixed
> > >>     length or both.
> > >>
> > >>     Stuart
> > >>
> > >>     Edgar Espina wrote:
> > >>
> > >>         latest: 1.2.0.Beta8
> > >>
> > >>         On Sun, Jan 18, 2015 at 9:42 PM, Stuart Douglas
> > >>         <sdouglas at redhat.com <mailto:sdouglas at redhat.com>
> > >>         <mailto:sdouglas at redhat.com <mailto:sdouglas at redhat.com>>>
> wrote:
> > >>
> > >>              Also what version of Undertow are you using?
> > >>
> > >>              Stuart
> > >>
> > >>              ----- Original Message -----
> > >>         >   From: "Edgar Espina" <espina.edgar at gmail.com
> > >>         <mailto:espina.edgar at gmail.com>
> > >>         <mailto:espina.edgar at gmail.com <mailto:espina.edgar at gmail.com
> > >> >__>>
> > >>         >  To: "Stuart Douglas" <sdouglas at redhat.com
> > >>         <mailto:sdouglas at redhat.com>
> > >>         <mailto:sdouglas at redhat.com <mailto:sdouglas at redhat.com>>>
> > >>         >  Cc: undertow-dev at lists.jboss.org
> > >>         <mailto:undertow-dev at lists.jboss.org>
> > >>         <mailto:undertow-dev at lists.__jboss.org
> > >>         <mailto:undertow-dev at lists.jboss.org>>
> > >>         >  Sent: Monday, 19 January, 2015 11:13:21 AM
> > >>         >  Subject: Re: [undertow-dev] occasional 502 from Apache HTTP
> > >> Proxy
> > >>         >
> > >>         >  found this in apache:
> > >>         >
> > >>         >  (104) Connection reset by peer: proxy: error reading status
> > >>         line from
> > >>         >  remote server
> > >>         >
> > >>         >  but nothing in undertow.
> > >>         >
> > >>         >  got 502 on HTTP GET. Sometimes while calling the home page
> / or
> > >>              when page
> > >>         >  loads OK, got 502 on page resources (js, css, images).
> > >>         >
> > >>         >  I call startBlocking and use the outputstream to write the
> > >>              response, when
> > >>         >  everything has been written I call the "outputstream.close"
> > >>              method. Do I
> > >>         >  need to call exchange.endExchange too?
> > >>         >
> > >>         >  Thanks
> > >>         >
> > >>         >  On Sun, Jan 18, 2015 at 8:52 PM, Stuart Douglas
> > >>         <sdouglas at redhat.com <mailto:sdouglas at redhat.com>
> > >>         <mailto:sdouglas at redhat.com <mailto:sdouglas at redhat.com>>>
> wrote:
> > >>         >
> > >>         >  > Is there any info in the log? Or is there any specific
> type
> > >> of
> > >>              request
> > >>         >  > that causes this?
> > >>         >  >
> > >>         >  > Stuart
> > >>         >  >
> > >>         >  >
> > >>         >  > ----- Original Message -----
> > >>         >  > > From: "Edgar Espina" <espina.edgar at gmail.com
> > >>         <mailto:espina.edgar at gmail.com>
> > >>         <mailto:espina.edgar at gmail.com <mailto:espina.edgar at gmail.com
> > >> >__>>
> > >>          > > > To: undertow-dev at lists.jboss.org
> > >>         <mailto:undertow-dev at lists.jboss.org>
> > >>         <mailto:undertow-dev at lists.__jboss.org
> > >>         <mailto:undertow-dev at lists.jboss.org>>
> > >>          > > > Sent: Monday, 19 January, 2015 9:42:19 AM
> > >>          > > > Subject: [undertow-dev] occasional 502 from Apache HTTP
> > >> Proxy
> > >>          > > >
> > >>          > > > Hi,
> > >>          > > >
> > >>          > > > I've an Undertow application behind apache reverse
> proxy,
> > >>              trying to load
> > >>          > > a
> > >>          > > > page displays error 502 proxy error.
> > >>          > > >
> > >>          > > > Still couldn't find why so I wonder if any of you find
> a
> > >>              similar problem
> > >>          > > with
> > >>          > > > Undertow and Apache.
> > >>          > > >
> > >>          > > > Please note this is our first app on top of Undertow,
> > >>              existing apps
> > >>          > > running
> > >>          > > > on Tomcat/Jetty are OK.
> > >>          > > >
> > >>          > > > Appreciate any help.
> > >>          > > >
> > >>          > > > Thanks
> > >>          > > >
> > >>          > > > --
> > >>          > > > edgar
> > >>          > > >
> > >>          > > > _________________________________________________
> > >>          > > > undertow-dev mailing list
> > >>          > > > undertow-dev at lists.jboss.org
> > >>         <mailto:undertow-dev at lists.jboss.org>
> > >>         <mailto:undertow-dev at lists.__jboss.org
> > >>         <mailto:undertow-dev at lists.jboss.org>>
> > >>         >  > >
> https://lists.jboss.org/__mailman/listinfo/undertow-dev
> > >>         <https://lists.jboss.org/mailman/listinfo/undertow-dev>
> > >>         >  >
> > >>         >
> > >>         >
> > >>         >
> > >>         >  --
> > >>         >  edgar
> > >>         >
> > >>
> > >>
> > >>
> > >>
> > >>         --
> > >>         edgar
> > >>
> > >>
> > >>
> > >>
> > >> --
> > >> edgar
> > >>
> > >
> >
> >
> > --
> > edgar
> >
>



-- 
edgar
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