[undertow-dev] occasional 502 from Apache HTTP Proxy

[Edgar Espina]

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
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