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(a)gmail.com&gt; > To: undertow-dev(a)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(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/undertow-dev

Also what version of Undertow are you using? Stuart ----- Original Message ----- > From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; > Cc: undertow-dev(a)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(a)redhat.com&gt; 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(a)gmail.com&gt; > > > To: undertow-dev(a)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(a)lists.jboss.org > > > https://lists.jboss.org/mailman/listinfo/undertow-dev > > > > > > -- > edgar >

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(a)redhat.com > <mailto:sdouglas@redhat.com>> wrote: > > Also what version of Undertow are you using? > > Stuart > > ----- Original Message ----- > > From: "Edgar Espina" <espina.edgar(a)gmail.com > <mailto:espina.edgar@gmail.com>> > > To: "Stuart Douglas" <sdouglas(a)redhat.com > <mailto:sdouglas@redhat.com>> > > Cc: undertow-dev(a)lists.jboss.org > <mailto:undertow-dev@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(a)redhat.com <mailto:sdouglas@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(a)gmail.com > <mailto:espina.edgar@gmail.com>> > > > > To: undertow-dev(a)lists.jboss.org > <mailto:undertow-dev@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(a)lists.jboss.org > <mailto:undertow-dev@lists.jboss.org> > > > > https://lists.jboss.org/mailman/listinfo/undertow-dev > > > > > > > > > > > -- > > edgar > > > > > > > -- > edgar >

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(a)redhat.com > <mailto:sdouglas@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(a)redhat.com <mailto:sdouglas@redhat.com> > <mailto:sdouglas@redhat.com <mailto:sdouglas@redhat.com>>> wrote: > > Also what version of Undertow are you using? > > Stuart > > ----- Original Message ----- > > From: "Edgar Espina" <espina.edgar(a)gmail.com > <mailto:espina.edgar@gmail.com> > <mailto:espina.edgar@gmail.com <mailto:espina.edgar@gmail.com > >__>> > > To: "Stuart Douglas" <sdouglas(a)redhat.com > <mailto:sdouglas@redhat.com> > <mailto:sdouglas@redhat.com <mailto:sdouglas@redhat.com>>> > > Cc: undertow-dev(a)lists.jboss.org > <mailto:undertow-dev@lists.jboss.org> > <mailto:undertow-dev@lists.__jboss.org > <mailto:undertow-dev@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(a)redhat.com <mailto:sdouglas@redhat.com> > <mailto:sdouglas@redhat.com <mailto:sdouglas@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(a)gmail.com > <mailto:espina.edgar@gmail.com> > <mailto:espina.edgar@gmail.com <mailto:espina.edgar@gmail.com > >__>> > > > > To: undertow-dev(a)lists.jboss.org > <mailto:undertow-dev@lists.jboss.org> > <mailto:undertow-dev@lists.__jboss.org > <mailto:undertow-dev@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(a)lists.jboss.org > <mailto:undertow-dev@lists.jboss.org> > <mailto:undertow-dev@lists.__jboss.org > <mailto:undertow-dev@lists.jboss.org>> > > > > https://lists.jboss.org/__mailman/listinfo/undertow-dev > <https://lists.jboss.org/mailman/listinfo/undertow-dev> > > > > > > > > > > > -- > > edgar > > > > > > > -- > edgar > > > > > -- > edgar >

From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; Cc: undertow-dev(a)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(a)redhat.com&gt; 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(a)redhat.com >> <mailto:sdouglas@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(a)redhat.com <mailto:sdouglas@redhat.com> >> <mailto:sdouglas@redhat.com <mailto:sdouglas@redhat.com>>> wrote: >> >> Also what version of Undertow are you using? >> >> Stuart >> >> ----- Original Message ----- >> > From: "Edgar Espina" <espina.edgar(a)gmail.com >> <mailto:espina.edgar@gmail.com> >> <mailto:espina.edgar@gmail.com <mailto:espina.edgar@gmail.com >> >__>> >> > To: "Stuart Douglas" <sdouglas(a)redhat.com >> <mailto:sdouglas@redhat.com> >> <mailto:sdouglas@redhat.com <mailto:sdouglas@redhat.com>>> >> > Cc: undertow-dev(a)lists.jboss.org >> <mailto:undertow-dev@lists.jboss.org> >> <mailto:undertow-dev@lists.__jboss.org >> <mailto:undertow-dev@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(a)redhat.com <mailto:sdouglas@redhat.com> >> <mailto:sdouglas@redhat.com <mailto:sdouglas@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(a)gmail.com >> <mailto:espina.edgar@gmail.com> >> <mailto:espina.edgar@gmail.com <mailto:espina.edgar@gmail.com >> >__>> >> > > > To: undertow-dev(a)lists.jboss.org >> <mailto:undertow-dev@lists.jboss.org> >> <mailto:undertow-dev@lists.__jboss.org >> <mailto:undertow-dev@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(a)lists.jboss.org >> <mailto:undertow-dev@lists.jboss.org> >> <mailto:undertow-dev@lists.__jboss.org >> <mailto:undertow-dev@lists.jboss.org>> >> > > > https://lists.jboss.org/__mailman/listinfo/undertow-dev >> <https://lists.jboss.org/mailman/listinfo/undertow-dev> >> > > >> > >> > >> > >> > -- >> > edgar >> > >> >> >> >> >> -- >> edgar >> >> >> >> >> -- >> edgar >> > -- edgar

From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; Cc: undertow-dev(a)lists.jboss.org Sent: Monday, 19 January, 2015 2:53:06 PM Subject: Re: [undertow-dev] occasional 502 from Apache HTTP Proxy Done, but makes no difference. Still got the 502 random errors :S On Sun, Jan 18, 2015 at 11:13 PM, Stuart Douglas <sdouglas(a)redhat.com&gt; 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(a)gmail.com&gt; > > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; > > Cc: undertow-dev(a)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(a)redhat.com&gt; > 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(a)redhat.com > > >> <mailto:sdouglas@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(a)redhat.com <mailto:sdouglas@redhat.com> > > >> <mailto:sdouglas@redhat.com <mailto:sdouglas@redhat.com>>> > wrote: > > >> > > >> Also what version of Undertow are you using? > > >> > > >> Stuart > > >> > > >> ----- Original Message ----- > > >> > From: "Edgar Espina" <espina.edgar(a)gmail.com > > >> <mailto:espina.edgar@gmail.com> > > >> <mailto:espina.edgar@gmail.com <mailto:espina.edgar@gmail.com > > >> >__>> > > >> > To: "Stuart Douglas" <sdouglas(a)redhat.com > > >> <mailto:sdouglas@redhat.com> > > >> <mailto:sdouglas@redhat.com <mailto:sdouglas@redhat.com>>> > > >> > Cc: undertow-dev(a)lists.jboss.org > > >> <mailto:undertow-dev@lists.jboss.org> > > >> <mailto:undertow-dev@lists.__jboss.org > > >> <mailto:undertow-dev@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(a)redhat.com <mailto:sdouglas@redhat.com> > > >> <mailto:sdouglas@redhat.com <mailto:sdouglas@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(a)gmail.com > > >> <mailto:espina.edgar@gmail.com> > > >> <mailto:espina.edgar@gmail.com <mailto:espina.edgar@gmail.com > > >> >__>> > > >> > > > To: undertow-dev(a)lists.jboss.org > > >> <mailto:undertow-dev@lists.jboss.org> > > >> <mailto:undertow-dev@lists.__jboss.org > > >> <mailto:undertow-dev@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(a)lists.jboss.org > > >> <mailto:undertow-dev@lists.jboss.org> > > >> <mailto:undertow-dev@lists.__jboss.org > > >> <mailto:undertow-dev@lists.jboss.org>> > > >> > > > > https://lists.jboss.org/__mailman/listinfo/undertow-dev > > >> <https://lists.jboss.org/mailman/listinfo/undertow-dev> > > >> > > > > >> > > > >> > > > >> > > > >> > -- > > >> > edgar > > >> > > > >> > > >> > > >> > > >> > > >> -- > > >> edgar > > >> > > >> > > >> > > >> > > >> -- > > >> edgar > > >> > > > > > > > > > -- > > edgar > > > -- edgar

The source code can be found here: https://github.com/jooby-project/jooby Undertow related classes are here: https://github.com/jooby-project/jooby/tree/master/jooby/src/main/java/or... . Server is built here: https://github.com/jooby-project/jooby/blob/master/jooby/src/main/java/or... Response is sent here: https://github.com/jooby-project/jooby/blob/master/jooby/src/main/java/or... My microweb-framework was built on top of Jetty, so for now I used the blocking API and follow more or less what we usually do with Servlets (acquire an outstream). I will review what I'm doing and try to figure it out what is going on too. Thanks for your help, Stuart. On Mon, Jan 19, 2015 at 2:12 AM, Stuart Douglas <sdouglas(a)redhat.com&gt; wrote: > My best guess as to what is happening is that Undertow closing a > connection after a request is done for some reason, and the apache attempts > to re-use this connection without realising that it is dead. > > In general this should not happen, Undertow should only forcibly close a > connection if it knows that it is broken (e.g. a content length is set and > the full amount of content is not written). For a normal graceful close > Undertow should be sending Connection:close headers. > > I am going to investigate some more, and see if I can figure out what is > going on. It seems unlikely but is there any chance your code forcibly > closes the ServerConnection (HttpServerExchange.getConnection()) because > that could potentially cause this issue. Setting the exchange to > non-persistent after headers have been sent could also cause it. > > Stuart > > ----- Original Message ----- > > From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; > > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; > > Cc: undertow-dev(a)lists.jboss.org > > Sent: Monday, 19 January, 2015 2:53:06 PM > > Subject: Re: [undertow-dev] occasional 502 from Apache HTTP Proxy > > > > Done, but makes no difference. Still got the 502 random errors :S > > > > On Sun, Jan 18, 2015 at 11:13 PM, Stuart Douglas <sdouglas(a)redhat.com&gt; > > 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(a)gmail.com&gt; > > > > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; > > > > Cc: undertow-dev(a)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(a)redhat.com&gt; > > > 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(a)redhat.com > > > > >> <mailto:sdouglas@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(a)redhat.com <mailto:sdouglas@redhat.com> > > > > >> <mailto:sdouglas@redhat.com <mailto:sdouglas@redhat.com > >>> > > > wrote: > > > > >> > > > > >> Also what version of Undertow are you using? > > > > >> > > > > >> Stuart > > > > >> > > > > >> ----- Original Message ----- > > > > >> > From: "Edgar Espina" <espina.edgar(a)gmail.com > > > > >> <mailto:espina.edgar@gmail.com> > > > > >> <mailto:espina.edgar@gmail.com <mailto: > espina.edgar(a)gmail.com > > > > >> >__>> > > > > >> > To: "Stuart Douglas" <sdouglas(a)redhat.com > > > > >> <mailto:sdouglas@redhat.com> > > > > >> <mailto:sdouglas@redhat.com <mailto:sdouglas@redhat.com > >>> > > > > >> > Cc: undertow-dev(a)lists.jboss.org > > > > >> <mailto:undertow-dev@lists.jboss.org> > > > > >> <mailto:undertow-dev@lists.__jboss.org > > > > >> <mailto:undertow-dev@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(a)redhat.com <mailto:sdouglas@redhat.com> > > > > >> <mailto:sdouglas@redhat.com <mailto:sdouglas@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(a)gmail.com > > > > >> <mailto:espina.edgar@gmail.com> > > > > >> <mailto:espina.edgar@gmail.com <mailto: > espina.edgar(a)gmail.com > > > > >> >__>> > > > > >> > > > To: undertow-dev(a)lists.jboss.org > > > > >> <mailto:undertow-dev@lists.jboss.org> > > > > >> <mailto:undertow-dev@lists.__jboss.org > > > > >> <mailto:undertow-dev@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(a)lists.jboss.org > > > > >> <mailto:undertow-dev@lists.jboss.org> > > > > >> <mailto:undertow-dev@lists.__jboss.org > > > > >> <mailto:undertow-dev@lists.jboss.org>> > > > > >> > > > > > > https://lists.jboss.org/__mailman/listinfo/undertow-dev > > > > >> <https://lists.jboss.org/mailman/listinfo/undertow-dev> > > > > >> > > > > > > >> > > > > > >> > > > > > >> > > > > > >> > -- > > > > >> > edgar > > > > >> > > > > > >> > > > > >> > > > > >> > > > > >> > > > > >> -- > > > > >> edgar > > > > >> > > > > >> > > > > >> > > > > >> > > > > >> -- > > > > >> edgar > > > > >> > > > > > > > > > > > > > > > > > -- > > > > edgar > > > > > > > > > > > > > > > -- > > edgar > > > -- edgar _______________________________________________ undertow-dev mailing list undertow-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/undertow-dev

Sure, it is 2.2.15. On Mon, Jan 19, 2015 at 9:29 AM, Tomaž Cerar <tomaz.cerar(a)gmail.com&gt; wrote: > Edgar, > > what is the version of Apache and mod_proxy module you are using. > maybe it will be easier to reproduce with exact version you have.. > > -- > tomaz > > On Mon, Jan 19, 2015 at 1:15 PM, Edgar Espina <espina.edgar(a)gmail.com&gt; > wrote: > >> The source code can be found here: >> https://github.com/jooby-project/jooby >> >> Undertow related classes are here: >> https://github.com/jooby-project/jooby/tree/master/jooby/src/main/java/or... >> . >> Server is built here: >> https://github.com/jooby-project/jooby/blob/master/jooby/src/main/java/or... >> Response is sent here: >> https://github.com/jooby-project/jooby/blob/master/jooby/src/main/java/or... >> >> My microweb-framework was built on top of Jetty, so for now I used the >> blocking API and follow more or less what we usually do with Servlets >> (acquire an outstream). >> >> I will review what I'm doing and try to figure it out what is going on >> too. >> >> Thanks for your help, Stuart. >> >> >> >> >> On Mon, Jan 19, 2015 at 2:12 AM, Stuart Douglas <sdouglas(a)redhat.com&gt; >> wrote: >> >>> My best guess as to what is happening is that Undertow closing a >>> connection after a request is done for some reason, and the apache attempts >>> to re-use this connection without realising that it is dead. >>> >>> In general this should not happen, Undertow should only forcibly close >>> a connection if it knows that it is broken (e.g. a content length is set >>> and the full amount of content is not written). For a normal graceful close >>> Undertow should be sending Connection:close headers. >>> >>> I am going to investigate some more, and see if I can figure out what >>> is going on. It seems unlikely but is there any chance your code forcibly >>> closes the ServerConnection (HttpServerExchange.getConnection()) because >>> that could potentially cause this issue. Setting the exchange to >>> non-persistent after headers have been sent could also cause it. >>> >>> Stuart >>> >>> ----- Original Message ----- >>> > From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; >>> > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; >>> > Cc: undertow-dev(a)lists.jboss.org >>> > Sent: Monday, 19 January, 2015 2:53:06 PM >>> > Subject: Re: [undertow-dev] occasional 502 from Apache HTTP Proxy >>> > >>> > Done, but makes no difference. Still got the 502 random errors :S >>> > >>> > On Sun, Jan 18, 2015 at 11:13 PM, Stuart Douglas <sdouglas(a)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(a)gmail.com&gt; >>> > > > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; >>> > > > Cc: undertow-dev(a)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(a)redhat.com&gt; >>> > > 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(a)redhat.com >>> > > > >> <mailto:sdouglas@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(a)redhat.com <mailto:sdouglas@redhat.com> >>> > > > >> <mailto:sdouglas@redhat.com <mailto: >>> sdouglas(a)redhat.com&gt;&gt;&gt; >>> > > wrote: >>> > > > >> >>> > > > >> Also what version of Undertow are you using? >>> > > > >> >>> > > > >> Stuart >>> > > > >> >>> > > > >> ----- Original Message ----- >>> > > > >> > From: "Edgar Espina" <espina.edgar(a)gmail.com >>> > > > >> <mailto:espina.edgar@gmail.com> >>> > > > >> <mailto:espina.edgar@gmail.com <mailto: >>> espina.edgar(a)gmail.com >>> > > > >> >__>> >>> > > > >> > To: "Stuart Douglas" <sdouglas(a)redhat.com >>> > > > >> <mailto:sdouglas@redhat.com> >>> > > > >> <mailto:sdouglas@redhat.com <mailto: >>> sdouglas(a)redhat.com&gt;&gt;&gt; >>> > > > >> > Cc: undertow-dev(a)lists.jboss.org >>> > > > >> <mailto:undertow-dev@lists.jboss.org> >>> > > > >> <mailto:undertow-dev@lists.__jboss.org >>> > > > >> <mailto:undertow-dev@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(a)redhat.com <mailto:sdouglas@redhat.com> >>> > > > >> <mailto:sdouglas@redhat.com <mailto: >>> sdouglas(a)redhat.com&gt;&gt;&gt; >>> > > 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(a)gmail.com >>> > > > >> <mailto:espina.edgar@gmail.com> >>> > > > >> <mailto:espina.edgar@gmail.com <mailto: >>> espina.edgar(a)gmail.com >>> > > > >> >__>> >>> > > > >> > > > To: undertow-dev(a)lists.jboss.org >>> > > > >> <mailto:undertow-dev@lists.jboss.org> >>> > > > >> <mailto:undertow-dev@lists.__jboss.org >>> > > > >> <mailto:undertow-dev@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(a)lists.jboss.org >>> > > > >> <mailto:undertow-dev@lists.jboss.org> >>> > > > >> <mailto:undertow-dev@lists.__jboss.org >>> > > > >> <mailto:undertow-dev@lists.jboss.org>> >>> > > > >> > > > >>> > > https://lists.jboss.org/__mailman/listinfo/undertow-dev >>> > > > >> <https://lists.jboss.org/mailman/listinfo/undertow-dev >>> > >>> > > > >> > > >>> > > > >> > >>> > > > >> > >>> > > > >> > >>> > > > >> > -- >>> > > > >> > edgar >>> > > > >> > >>> > > > >> >>> > > > >> >>> > > > >> >>> > > > >> >>> > > > >> -- >>> > > > >> edgar >>> > > > >> >>> > > > >> >>> > > > >> >>> > > > >> >>> > > > >> -- >>> > > > >> edgar >>> > > > >> >>> > > > > >>> > > > >>> > > > >>> > > > -- >>> > > > edgar >>> > > > >>> > > >>> > >>> > >>> > >>> > -- >>> > edgar >>> > >>> >> >> >> >> -- >> edgar >> >> _______________________________________________ >> undertow-dev mailing list >> undertow-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/undertow-dev >> > > -- edgar

From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; To: "Tomaž Cerar" <tomaz.cerar(a)gmail.com&gt; Cc: "Stuart Douglas" <sdouglas(a)redhat.com&gt;, undertow-dev(a)lists.jboss.org Sent: Wednesday, 21 January, 2015 2:03:10 AM Subject: Re: [undertow-dev] occasional 502 from Apache HTTP Proxy seems to be some sort of timeout, because everything work as expected, but then after waiting for a while and got again the 502.

also, I did set the content-length for static resources and call .endExchange after a 304 response, set a backlog of 1000 and 10000 too. But it didn't help. On Mon, Jan 19, 2015 at 9:57 AM, Tomaž Cerar <tomaz.cerar(a)gmail.com&gt; wrote: > Maybe related to > http://stackoverflow.com/questions/169453/bad-gateway-502-error-with-apac... > > or > http://qnalist.com/questions/4502641/users-httpd-mod-proxy-ignores-incomp... > > On Mon, Jan 19, 2015 at 1:33 PM, Edgar Espina <espina.edgar(a)gmail.com&gt; > wrote: > >> Sure, it is 2.2.15. >> >> >> >> On Mon, Jan 19, 2015 at 9:29 AM, Tomaž Cerar <tomaz.cerar(a)gmail.com&gt; >> wrote: >> >>> Edgar, >>> >>> what is the version of Apache and mod_proxy module you are using. >>> maybe it will be easier to reproduce with exact version you have.. >>> >>> -- >>> tomaz >>> >>> On Mon, Jan 19, 2015 at 1:15 PM, Edgar Espina <espina.edgar(a)gmail.com&gt; >>> wrote: >>> >>>> The source code can be found here: >>>> https://github.com/jooby-project/jooby >>>> >>>> Undertow related classes are here: >>>> https://github.com/jooby-project/jooby/tree/master/jooby/src/main/java/or... >>>> . >>>> Server is built here: >>>> https://github.com/jooby-project/jooby/blob/master/jooby/src/main/java/or... >>>> Response is sent here: >>>> https://github.com/jooby-project/jooby/blob/master/jooby/src/main/java/or... >>>> >>>> My microweb-framework was built on top of Jetty, so for now I used the >>>> blocking API and follow more or less what we usually do with Servlets >>>> (acquire an outstream). >>>> >>>> I will review what I'm doing and try to figure it out what is going on >>>> too. >>>> >>>> Thanks for your help, Stuart. >>>> >>>> >>>> >>>> >>>> On Mon, Jan 19, 2015 at 2:12 AM, Stuart Douglas <sdouglas(a)redhat.com&gt; >>>> wrote: >>>> >>>>> My best guess as to what is happening is that Undertow closing a >>>>> connection after a request is done for some reason, and the apache >>>>> attempts >>>>> to re-use this connection without realising that it is dead. >>>>> >>>>> In general this should not happen, Undertow should only forcibly close >>>>> a connection if it knows that it is broken (e.g. a content length is >>>>> set >>>>> and the full amount of content is not written). For a normal graceful >>>>> close >>>>> Undertow should be sending Connection:close headers. >>>>> >>>>> I am going to investigate some more, and see if I can figure out what >>>>> is going on. It seems unlikely but is there any chance your code >>>>> forcibly >>>>> closes the ServerConnection (HttpServerExchange.getConnection()) >>>>> because >>>>> that could potentially cause this issue. Setting the exchange to >>>>> non-persistent after headers have been sent could also cause it. >>>>> >>>>> Stuart >>>>> >>>>> ----- Original Message ----- >>>>> > From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; >>>>> > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; >>>>> > Cc: undertow-dev(a)lists.jboss.org >>>>> > Sent: Monday, 19 January, 2015 2:53:06 PM >>>>> > Subject: Re: [undertow-dev] occasional 502 from Apache HTTP Proxy >>>>> > >>>>> > Done, but makes no difference. Still got the 502 random errors :S >>>>> > >>>>> > On Sun, Jan 18, 2015 at 11:13 PM, Stuart Douglas < >>>>> sdouglas(a)redhat.com&gt; >>>>> > 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(a)gmail.com&gt; >>>>> > > > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; >>>>> > > > Cc: undertow-dev(a)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(a)redhat.com&gt; >>>>> > > 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(a)redhat.com >>>>> > > > >> <mailto:sdouglas@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(a)redhat.com <mailto:sdouglas@redhat.com> >>>>> > > > >> <mailto:sdouglas@redhat.com <mailto: >>>>> sdouglas(a)redhat.com&gt;&gt;&gt; >>>>> > > wrote: >>>>> > > > >> >>>>> > > > >> Also what version of Undertow are you using? >>>>> > > > >> >>>>> > > > >> Stuart >>>>> > > > >> >>>>> > > > >> ----- Original Message ----- >>>>> > > > >> > From: "Edgar Espina" <espina.edgar(a)gmail.com >>>>> > > > >> <mailto:espina.edgar@gmail.com> >>>>> > > > >> <mailto:espina.edgar@gmail.com <mailto: >>>>> espina.edgar(a)gmail.com >>>>> > > > >> >__>> >>>>> > > > >> > To: "Stuart Douglas" <sdouglas(a)redhat.com >>>>> > > > >> <mailto:sdouglas@redhat.com> >>>>> > > > >> <mailto:sdouglas@redhat.com <mailto: >>>>> sdouglas(a)redhat.com&gt;&gt;&gt; >>>>> > > > >> > Cc: undertow-dev(a)lists.jboss.org >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org> >>>>> > > > >> <mailto:undertow-dev@lists.__jboss.org >>>>> > > > >> <mailto:undertow-dev@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(a)redhat.com <mailto:sdouglas@redhat.com> >>>>> > > > >> <mailto:sdouglas@redhat.com <mailto: >>>>> sdouglas(a)redhat.com&gt;&gt;&gt; >>>>> > > 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(a)gmail.com >>>>> > > > >> <mailto:espina.edgar@gmail.com> >>>>> > > > >> <mailto:espina.edgar@gmail.com <mailto: >>>>> espina.edgar(a)gmail.com >>>>> > > > >> >__>> >>>>> > > > >> > > > To: undertow-dev(a)lists.jboss.org >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org> >>>>> > > > >> <mailto:undertow-dev@lists.__jboss.org >>>>> > > > >> <mailto:undertow-dev@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(a)lists.jboss.org >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org> >>>>> > > > >> <mailto:undertow-dev@lists.__jboss.org >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org>> >>>>> > > > >> > > > >>>>> > > https://lists.jboss.org/__mailman/listinfo/undertow-dev >>>>> > > > >> < >>>>> https://lists.jboss.org/mailman/listinfo/undertow-dev> >>>>> > > > >> > > >>>>> > > > >> > >>>>> > > > >> > >>>>> > > > >> > >>>>> > > > >> > -- >>>>> > > > >> > edgar >>>>> > > > >> > >>>>> > > > >> >>>>> > > > >> >>>>> > > > >> >>>>> > > > >> >>>>> > > > >> -- >>>>> > > > >> edgar >>>>> > > > >> >>>>> > > > >> >>>>> > > > >> >>>>> > > > >> >>>>> > > > >> -- >>>>> > > > >> edgar >>>>> > > > >> >>>>> > > > > >>>>> > > > >>>>> > > > >>>>> > > > -- >>>>> > > > edgar >>>>> > > > >>>>> > > >>>>> > >>>>> > >>>>> > >>>>> > -- >>>>> > edgar >>>>> > >>>>> >>>> >>>> >>>> >>>> -- >>>> edgar >>>> >>>> _______________________________________________ >>>> undertow-dev mailing list >>>> undertow-dev(a)lists.jboss.org >>>> https://lists.jboss.org/mailman/listinfo/undertow-dev >>>> >>> >>> >> >> >> -- >> edgar >> > > -- edgar

On Jan 21, 2015, at 1:40 PM, Edgar Espina <espina.edgar(a)gmail.com&gt; wrote: Nope, it doesn't help. Stuart, you mentioned that: "For a normal graceful close Undertow should be sending Connection:close headers." Is it mean that on a req/res cycle, Undertow should always set the Connection response header with close or keep-alive? Thanks On Tue, Jan 20, 2015 at 5:07 PM, Stuart Douglas <sdouglas(a)redhat.com&gt; wrote: ----- Original Message ----- > From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; > To: "Tomaž Cerar" <tomaz.cerar(a)gmail.com&gt; > Cc: "Stuart Douglas" <sdouglas(a)redhat.com&gt;, undertow-dev(a)lists.jboss.org > Sent: Wednesday, 21 January, 2015 2:03:10 AM > Subject: Re: [undertow-dev] occasional 502 from Apache HTTP Proxy > > seems to be some sort of timeout, because everything work as expected, but > then after waiting for a while and got again the 502. That is odd, as there is no timeout configured. What does your network config between the LB and Undertow look like? Does enabling TCP keep alive (Options.KEEP_ALIVE) help? Stuart > > also, I did set the content-length for static resources and call > .endExchange after a 304 response, set a backlog of 1000 and 10000 too. But > it didn't help. > > > > On Mon, Jan 19, 2015 at 9:57 AM, Tomaž Cerar <tomaz.cerar(a)gmail.com&gt; wrote: > > > Maybe related to > > http://stackoverflow.com/questions/169453/bad-gateway-502-error-with-apac... > > > > or > > http://qnalist.com/questions/4502641/users-httpd-mod-proxy-ignores-incomp... > > > > On Mon, Jan 19, 2015 at 1:33 PM, Edgar Espina <espina.edgar(a)gmail.com&gt; > > wrote: > > > >> Sure, it is 2.2.15. > >> > >> > >> > >> On Mon, Jan 19, 2015 at 9:29 AM, Tomaž Cerar <tomaz.cerar(a)gmail.com&gt; > >> wrote: > >> > >>> Edgar, > >>> > >>> what is the version of Apache and mod_proxy module you are using. > >>> maybe it will be easier to reproduce with exact version you have.. > >>> > >>> -- > >>> tomaz > >>> > >>> On Mon, Jan 19, 2015 at 1:15 PM, Edgar Espina <espina.edgar(a)gmail.com&gt; > >>> wrote: > >>> > >>>> The source code can be found here: > >>>> https://github.com/jooby-project/jooby > >>>> > >>>> Undertow related classes are here: > >>>> https://github.com/jooby-project/jooby/tree/master/jooby/src/main/java/or... > >>>> . > >>>> Server is built here: > >>>> https://github.com/jooby-project/jooby/blob/master/jooby/src/main/java/or... > >>>> Response is sent here: > >>>> https://github.com/jooby-project/jooby/blob/master/jooby/src/main/java/or... > >>>> > >>>> My microweb-framework was built on top of Jetty, so for now I used the > >>>> blocking API and follow more or less what we usually do with Servlets > >>>> (acquire an outstream). > >>>> > >>>> I will review what I'm doing and try to figure it out what is going on > >>>> too. > >>>> > >>>> Thanks for your help, Stuart. > >>>> > >>>> > >>>> > >>>> > >>>> On Mon, Jan 19, 2015 at 2:12 AM, Stuart Douglas <sdouglas(a)redhat.com&gt; > >>>> wrote: > >>>> > >>>>> My best guess as to what is happening is that Undertow closing a > >>>>> connection after a request is done for some reason, and the apache > >>>>> attempts > >>>>> to re-use this connection without realising that it is dead. > >>>>> > >>>>> In general this should not happen, Undertow should only forcibly close > >>>>> a connection if it knows that it is broken (e.g. a content length is > >>>>> set > >>>>> and the full amount of content is not written). For a normal graceful > >>>>> close > >>>>> Undertow should be sending Connection:close headers. > >>>>> > >>>>> I am going to investigate some more, and see if I can figure out what > >>>>> is going on. It seems unlikely but is there any chance your code > >>>>> forcibly > >>>>> closes the ServerConnection (HttpServerExchange.getConnection()) > >>>>> because > >>>>> that could potentially cause this issue. Setting the exchange to > >>>>> non-persistent after headers have been sent could also cause it. > >>>>> > >>>>> Stuart > >>>>> > >>>>> ----- Original Message ----- > >>>>> > From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; > >>>>> > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; > >>>>> > Cc: undertow-dev(a)lists.jboss.org > >>>>> > Sent: Monday, 19 January, 2015 2:53:06 PM > >>>>> > Subject: Re: [undertow-dev] occasional 502 from Apache HTTP Proxy > >>>>> > > >>>>> > Done, but makes no difference. Still got the 502 random errors :S > >>>>> > > >>>>> > On Sun, Jan 18, 2015 at 11:13 PM, Stuart Douglas < > >>>>> sdouglas(a)redhat.com&gt; > >>>>> > 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(a)gmail.com&gt; > >>>>> > > > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; > >>>>> > > > Cc: undertow-dev(a)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(a)redhat.com&gt; > >>>>> > > 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(a)redhat.com > >>>>> > > > >> <mailto:sdouglas@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(a)redhat.com <mailto:sdouglas@redhat.com> > >>>>> > > > >> <mailto:sdouglas@redhat.com <mailto: > >>>>> sdouglas(a)redhat.com&gt;&gt;&gt; > >>>>> > > wrote: > >>>>> > > > >> > >>>>> > > > >> Also what version of Undertow are you using? > >>>>> > > > >> > >>>>> > > > >> Stuart > >>>>> > > > >> > >>>>> > > > >> ----- Original Message ----- > >>>>> > > > >> > From: "Edgar Espina" <espina.edgar(a)gmail.com > >>>>> > > > >> <mailto:espina.edgar@gmail.com> > >>>>> > > > >> <mailto:espina.edgar@gmail.com <mailto: > >>>>> espina.edgar(a)gmail.com > >>>>> > > > >> >__>> > >>>>> > > > >> > To: "Stuart Douglas" <sdouglas(a)redhat.com > >>>>> > > > >> <mailto:sdouglas@redhat.com> > >>>>> > > > >> <mailto:sdouglas@redhat.com <mailto: > >>>>> sdouglas(a)redhat.com&gt;&gt;&gt; > >>>>> > > > >> > Cc: undertow-dev(a)lists.jboss.org > >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org> > >>>>> > > > >> <mailto:undertow-dev@lists.__jboss.org > >>>>> > > > >> <mailto:undertow-dev@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(a)redhat.com <mailto:sdouglas@redhat.com> > >>>>> > > > >> <mailto:sdouglas@redhat.com <mailto: > >>>>> sdouglas(a)redhat.com&gt;&gt;&gt; > >>>>> > > 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(a)gmail.com > >>>>> > > > >> <mailto:espina.edgar@gmail.com> > >>>>> > > > >> <mailto:espina.edgar@gmail.com <mailto: > >>>>> espina.edgar(a)gmail.com > >>>>> > > > >> >__>> > >>>>> > > > >> > > > To: undertow-dev(a)lists.jboss.org > >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org> > >>>>> > > > >> <mailto:undertow-dev@lists.__jboss.org > >>>>> > > > >> <mailto:undertow-dev@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(a)lists.jboss.org > >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org> > >>>>> > > > >> <mailto:undertow-dev@lists.__jboss.org > >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org>> > >>>>> > > > >> > > > > >>>>> > > https://lists.jboss.org/__mailman/listinfo/undertow-dev > >>>>> > > > >> < > >>>>> https://lists.jboss.org/mailman/listinfo/undertow-dev> > >>>>> > > > >> > > > >>>>> > > > >> > > >>>>> > > > >> > > >>>>> > > > >> > > >>>>> > > > >> > -- > >>>>> > > > >> > edgar > >>>>> > > > >> > > >>>>> > > > >> > >>>>> > > > >> > >>>>> > > > >> > >>>>> > > > >> > >>>>> > > > >> -- > >>>>> > > > >> edgar > >>>>> > > > >> > >>>>> > > > >> > >>>>> > > > >> > >>>>> > > > >> > >>>>> > > > >> -- > >>>>> > > > >> edgar > >>>>> > > > >> > >>>>> > > > > > >>>>> > > > > >>>>> > > > > >>>>> > > > -- > >>>>> > > > edgar > >>>>> > > > > >>>>> > > > >>>>> > > >>>>> > > >>>>> > > >>>>> > -- > >>>>> > edgar > >>>>> > > >>>>> > >>>> > >>>> > >>>> > >>>> -- > >>>> edgar > >>>> > >>>> _______________________________________________ > >>>> undertow-dev mailing list > >>>> undertow-dev(a)lists.jboss.org > >>>> https://lists.jboss.org/mailman/listinfo/undertow-dev > >>>> > >>> > >>> > >> > >> > >> -- > >> edgar > >> > > > > > > > -- > edgar > -- edgar _______________________________________________ undertow-dev mailing list undertow-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/undertow-dev

From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; To: "Jason Greene" <jason.greene(a)redhat.com&gt; Cc: "Stuart Douglas" <sdouglas(a)redhat.com&gt;, undertow-dev(a)lists.jboss.org Sent: Friday, 23 January, 2015 3:18:25 AM Subject: Re: [undertow-dev] occasional 502 from Apache HTTP Proxy we put nginx upfront undertow and everything works as expected. so we have: apache -> nginx -> undertow :S apache can't be removed it and as I said before existing apps running on Tomcat/Jetty work without any issue we need to move on with our project (wasted a lot of time on this) but I will try capture the traffic with wireshark and shared it. still, if you find out something will be helpful too. On Wed, Jan 21, 2015 at 4:51 PM, Jason Greene <jason.greene(a)redhat.com&gt; wrote: > Would you be willing to capture the traffic with wireshark or (tcpdump > using -s 65535) when the failure occurs? It would be helpful in diagnosing > the exact reason the connection is lost (tcp, http protocol issue, etc). > > If you prefer not to post the dump on list, you can email us privately. > > Thanks! > > > > On Jan 21, 2015, at 1:40 PM, Edgar Espina <espina.edgar(a)gmail.com&gt; > wrote: > > > > Nope, it doesn't help. > > > > Stuart, you mentioned that: > > "For a normal graceful close Undertow should be sending Connection:close > headers." > > > > Is it mean that on a req/res cycle, Undertow should always set the > Connection response header with close or keep-alive? > > > > Thanks > > > > > > > > > > On Tue, Jan 20, 2015 at 5:07 PM, Stuart Douglas <sdouglas(a)redhat.com&gt; > wrote: > > > > > > ----- Original Message ----- > > > From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; > > > To: "Tomaž Cerar" <tomaz.cerar(a)gmail.com&gt; > > > Cc: "Stuart Douglas" <sdouglas(a)redhat.com&gt;, > undertow-dev(a)lists.jboss.org > > > Sent: Wednesday, 21 January, 2015 2:03:10 AM > > > Subject: Re: [undertow-dev] occasional 502 from Apache HTTP Proxy > > > > > > seems to be some sort of timeout, because everything work as expected, > but > > > then after waiting for a while and got again the 502. > > > > That is odd, as there is no timeout configured. What does your network > config between the LB and Undertow look like? > > > > Does enabling TCP keep alive (Options.KEEP_ALIVE) help? > > > > Stuart > > > > > > > > > > also, I did set the content-length for static resources and call > > > .endExchange after a 304 response, set a backlog of 1000 and 10000 > too. But > > > it didn't help. > > > > > > > > > > > > On Mon, Jan 19, 2015 at 9:57 AM, Tomaž Cerar <tomaz.cerar(a)gmail.com&gt; > wrote: > > > > > > > Maybe related to > > > > > http://stackoverflow.com/questions/169453/bad-gateway-502-error-with-apac... > > > > > > > > or > > > > > http://qnalist.com/questions/4502641/users-httpd-mod-proxy-ignores-incomp... > > > > > > > > On Mon, Jan 19, 2015 at 1:33 PM, Edgar Espina < > espina.edgar(a)gmail.com&gt; > > > > wrote: > > > > > > > >> Sure, it is 2.2.15. > > > >> > > > >> > > > >> > > > >> On Mon, Jan 19, 2015 at 9:29 AM, Tomaž Cerar <tomaz.cerar(a)gmail.com > > > > > >> wrote: > > > >> > > > >>> Edgar, > > > >>> > > > >>> what is the version of Apache and mod_proxy module you are using. > > > >>> maybe it will be easier to reproduce with exact version you have.. > > > >>> > > > >>> -- > > > >>> tomaz > > > >>> > > > >>> On Mon, Jan 19, 2015 at 1:15 PM, Edgar Espina < > espina.edgar(a)gmail.com&gt; > > > >>> wrote: > > > >>> > > > >>>> The source code can be found here: > > > >>>> https://github.com/jooby-project/jooby > > > >>>> > > > >>>> Undertow related classes are here: > > > >>>> > https://github.com/jooby-project/jooby/tree/master/jooby/src/main/java/or... > > > >>>> . > > > >>>> Server is built here: > > > >>>> > https://github.com/jooby-project/jooby/blob/master/jooby/src/main/java/or... > > > >>>> Response is sent here: > > > >>>> > https://github.com/jooby-project/jooby/blob/master/jooby/src/main/java/or... > > > >>>> > > > >>>> My microweb-framework was built on top of Jetty, so for now I > used the > > > >>>> blocking API and follow more or less what we usually do with > Servlets > > > >>>> (acquire an outstream). > > > >>>> > > > >>>> I will review what I'm doing and try to figure it out what is > going on > > > >>>> too. > > > >>>> > > > >>>> Thanks for your help, Stuart. > > > >>>> > > > >>>> > > > >>>> > > > >>>> > > > >>>> On Mon, Jan 19, 2015 at 2:12 AM, Stuart Douglas < > sdouglas(a)redhat.com&gt; > > > >>>> wrote: > > > >>>> > > > >>>>> My best guess as to what is happening is that Undertow closing a > > > >>>>> connection after a request is done for some reason, and the > apache > > > >>>>> attempts > > > >>>>> to re-use this connection without realising that it is dead. > > > >>>>> > > > >>>>> In general this should not happen, Undertow should only forcibly > close > > > >>>>> a connection if it knows that it is broken (e.g. a content > length is > > > >>>>> set > > > >>>>> and the full amount of content is not written). For a normal > graceful > > > >>>>> close > > > >>>>> Undertow should be sending Connection:close headers. > > > >>>>> > > > >>>>> I am going to investigate some more, and see if I can figure out > what > > > >>>>> is going on. It seems unlikely but is there any chance your code > > > >>>>> forcibly > > > >>>>> closes the ServerConnection (HttpServerExchange.getConnection()) > > > >>>>> because > > > >>>>> that could potentially cause this issue. Setting the exchange to > > > >>>>> non-persistent after headers have been sent could also cause it. > > > >>>>> > > > >>>>> Stuart > > > >>>>> > > > >>>>> ----- Original Message ----- > > > >>>>> > From: "Edgar Espina" <espina.edgar(a)gmail.com&gt; > > > >>>>> > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; > > > >>>>> > Cc: undertow-dev(a)lists.jboss.org > > > >>>>> > Sent: Monday, 19 January, 2015 2:53:06 PM > > > >>>>> > Subject: Re: [undertow-dev] occasional 502 from Apache HTTP > Proxy > > > >>>>> > > > > >>>>> > Done, but makes no difference. Still got the 502 random errors > :S > > > >>>>> > > > > >>>>> > On Sun, Jan 18, 2015 at 11:13 PM, Stuart Douglas < > > > >>>>> sdouglas(a)redhat.com&gt; > > > >>>>> > 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(a)gmail.com&gt; > > > >>>>> > > > To: "Stuart Douglas" <sdouglas(a)redhat.com&gt; > > > >>>>> > > > Cc: undertow-dev(a)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(a)redhat.com&gt; > > > >>>>> > > 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(a)redhat.com > > > >>>>> > > > >> <mailto:sdouglas@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(a)redhat.com <mailto: > sdouglas(a)redhat.com&gt; > > > >>>>> > > > >> <mailto:sdouglas@redhat.com <mailto: > > > >>>>> sdouglas(a)redhat.com&gt;&gt;&gt; > > > >>>>> > > wrote: > > > >>>>> > > > >> > > > >>>>> > > > >> Also what version of Undertow are you > using? > > > >>>>> > > > >> > > > >>>>> > > > >> Stuart > > > >>>>> > > > >> > > > >>>>> > > > >> ----- Original Message ----- > > > >>>>> > > > >> > From: "Edgar Espina" < > espina.edgar(a)gmail.com > > > >>>>> > > > >> <mailto:espina.edgar@gmail.com> > > > >>>>> > > > >> <mailto:espina.edgar@gmail.com <mailto: > > > >>>>> espina.edgar(a)gmail.com > > > >>>>> > > > >> >__>> > > > >>>>> > > > >> > To: "Stuart Douglas" <sdouglas(a)redhat.com > > > >>>>> > > > >> <mailto:sdouglas@redhat.com> > > > >>>>> > > > >> <mailto:sdouglas@redhat.com <mailto: > > > >>>>> sdouglas(a)redhat.com&gt;&gt;&gt; > > > >>>>> > > > >> > Cc: undertow-dev(a)lists.jboss.org > > > >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org> > > > >>>>> > > > >> <mailto:undertow-dev@lists.__jboss.org > > > >>>>> > > > >> <mailto:undertow-dev@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(a)redhat.com <mailto: > sdouglas(a)redhat.com&gt; > > > >>>>> > > > >> <mailto:sdouglas@redhat.com <mailto: > > > >>>>> sdouglas(a)redhat.com&gt;&gt;&gt; > > > >>>>> > > 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(a)gmail.com > > > >>>>> > > > >> <mailto:espina.edgar@gmail.com> > > > >>>>> > > > >> <mailto:espina.edgar@gmail.com <mailto: > > > >>>>> espina.edgar(a)gmail.com > > > >>>>> > > > >> >__>> > > > >>>>> > > > >> > > > To: undertow-dev(a)lists.jboss.org > > > >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org> > > > >>>>> > > > >> <mailto:undertow-dev@lists.__jboss.org > > > >>>>> > > > >> <mailto:undertow-dev@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(a)lists.jboss.org > > > >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org> > > > >>>>> > > > >> <mailto:undertow-dev@lists.__jboss.org > > > >>>>> > > > >> <mailto:undertow-dev@lists.jboss.org>> > > > >>>>> > > > >> > > > > > > >>>>> > > https://lists.jboss.org/__mailman/listinfo/undertow-dev > > > >>>>> > > > >> < > > > >>>>> https://lists.jboss.org/mailman/listinfo/undertow-dev> > > > >>>>> > > > >> > > > > > >>>>> > > > >> > > > > >>>>> > > > >> > > > > >>>>> > > > >> > > > > >>>>> > > > >> > -- > > > >>>>> > > > >> > edgar > > > >>>>> > > > >> > > > > >>>>> > > > >> > > > >>>>> > > > >> > > > >>>>> > > > >> > > > >>>>> > > > >> > > > >>>>> > > > >> -- > > > >>>>> > > > >> edgar > > > >>>>> > > > >> > > > >>>>> > > > >> > > > >>>>> > > > >> > > > >>>>> > > > >> > > > >>>>> > > > >> -- > > > >>>>> > > > >> edgar > > > >>>>> > > > >> > > > >>>>> > > > > > > > >>>>> > > > > > > >>>>> > > > > > > >>>>> > > > -- > > > >>>>> > > > edgar > > > >>>>> > > > > > > >>>>> > > > > > >>>>> > > > > >>>>> > > > > >>>>> > > > > >>>>> > -- > > > >>>>> > edgar > > > >>>>> > > > > >>>>> > > > >>>> > > > >>>> > > > >>>> > > > >>>> -- > > > >>>> edgar > > > >>>> > > > >>>> _______________________________________________ > > > >>>> undertow-dev mailing list > > > >>>> undertow-dev(a)lists.jboss.org > > > >>>> https://lists.jboss.org/mailman/listinfo/undertow-dev > > > >>>> > > > >>> > > > >>> > > > >> > > > >> > > > >> -- > > > >> edgar > > > >> > > > > > > > > > > > > > > > > > -- > > > edgar > > > > > > > > > > > -- > > edgar > > _______________________________________________ > > undertow-dev mailing list > > undertow-dev(a)lists.jboss.org > > https://lists.jboss.org/mailman/listinfo/undertow-dev > > -- > Jason T. Greene > WildFly Lead / JBoss EAP Platform Architect > JBoss, a division of Red Hat > > -- edgar