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From: Magnus Hagander <magnus@hagander.net>
Date: Thu, 8 Nov 2018 09:19:22 +0100
Message-ID: 
 <CABUevExk3ytB9JPuamcpAy-d75j24JwQ657+Y-Jgt3MYuaK-Qg@mail.gmail.com>
Subject: Re: 503 Backend fetch failed errors
To: Stefan Kaltenbrunner <stefan@kaltenbrunner.cc>
Cc: remi_zara@mac.com, buildfarm-members@lists.postgresql.org,
	sysadmins <sysadmins@lists.postgresql.org>
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On Thu, Nov 8, 2018 at 9:01 AM Stefan Kaltenbrunner <stefan@kaltenbrunner.c=
c>
wrote:

> On 11/7/18 6:40 PM, R=C3=A9mi Zara wrote:
> > Hi,
>
> Hi R=C3=A9mi!
>
> >
> > I=E2=80=99m getting a lot of these errors with coypu (several per day),=
 but not
> systematically.
> > Is this a problem on my end, or is this on the sever end ?
> >
> > Query for: stage=3DOK&animal=3Dcoypu&ts=3D1541573277
> > Target:
> https://buildfarm.postgresql.org/cgi-bin/pgstatus.pl/53b137e7c765b781699b=
be73e3aec7751a8c4ab7
> > Status Line: 503 Backend fetch failed
> > Web txn failed with status: 1
> > Query for: stage=3DOK&animal=3Dcoypu&ts=3D1541575423
> > Target:
> https://buildfarm.postgresql.org/cgi-bin/pgstatus.pl/5e8e0913dc9f9a580a41=
25264d74fff95f26c926
> > Status Line: 503 Backend fetch failed
> > Web txn failed with status: 1
>
> given the error this is something that is created by the varnish
> instance that is in front of the buildfarm. On a quick look I could
> immediately figure out what the problem is - but it looks like you (or
> somebody else) tried at least to click one of the links above using hist
> desktop browser and got an error about a missing branch specification ;)
>
>
>
AFAICT:

A quick look in the logs indicates that the buildfarm is responding:
-   RespHeader     Status: 492 bad branch parameter

However, 492 is not a valid http status code, so Varnish can't handle it
and thus returns 503 failure to the client.


--=20
 Magnus Hagander
 Me: https://www.hagander.net/ <http://www.hagander.net/>
 Work: https://www.redpill-linpro.com/ <http://www.redpill-linpro.com/>

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<div dir=3D"ltr"><div dir=3D"ltr"><br><br><div class=3D"gmail_quote"><div d=
ir=3D"ltr">On Thu, Nov 8, 2018 at 9:01 AM Stefan Kaltenbrunner &lt;stefan@k=
altenbrunner.cc&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">On 11/7/18 6:40 PM, R=C3=A9mi Zara wrote:<br>
&gt; Hi,<br>
<br>
Hi R=C3=A9mi!<br>
<br>
&gt; <br>
&gt; I=E2=80=99m getting a lot of these errors with coypu (several per day)=
, but not systematically.<br>
&gt; Is this a problem on my end, or is this on the sever end ?<br>
&gt; <br>
&gt; Query for: stage=3DOK&amp;animal=3Dcoypu&amp;ts=3D1541573277<br>
&gt; Target: <a href=3D"https://buildfarm.postgresql.org/cgi-bin/pgstatus.p=
l/53b137e7c765b781699bbe73e3aec7751a8c4ab7" rel=3D"noreferrer" target=3D"_b=
lank">https://buildfarm.postgresql.org/cgi-bin/pgstatus.pl/53b137e7c765b781=
699bbe73e3aec7751a8c4ab7</a><br>
&gt; Status Line: 503 Backend fetch failed<br>
&gt; Web txn failed with status: 1<br>
&gt; Query for: stage=3DOK&amp;animal=3Dcoypu&amp;ts=3D1541575423<br>
&gt; Target: <a href=3D"https://buildfarm.postgresql.org/cgi-bin/pgstatus.p=
l/5e8e0913dc9f9a580a4125264d74fff95f26c926" rel=3D"noreferrer" target=3D"_b=
lank">https://buildfarm.postgresql.org/cgi-bin/pgstatus.pl/5e8e0913dc9f9a58=
0a4125264d74fff95f26c926</a><br>
&gt; Status Line: 503 Backend fetch failed<br>
&gt; Web txn failed with status: 1<br>
<br>
given the error this is something that is created by the varnish <br>
instance that is in front of the buildfarm. On a quick look I could <br>
immediately figure out what the problem is - but it looks like you (or <br>
somebody else) tried at least to click one of the links above using hist <b=
r>
desktop browser and got an error about a missing branch specification ;)<br=
>
<br><br></blockquote><div><br></div><div>AFAICT:</div><div><br></div><div>A=
 quick look in the logs indicates that the buildfarm is responding:</div><d=
iv>-=C2=A0 =C2=A0RespHeader=C2=A0 =C2=A0 =C2=A0Status: 492 bad branch param=
eter</div><div><br></div><div>However, 492 is not a valid http status code,=
 so Varnish can&#39;t handle it and thus returns 503 failure to the client.=
</div></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr" class=
=3D"gmail_signature"><div dir=3D"ltr"><div>=C2=A0Magnus Hagander<br>=C2=A0M=
e: <a href=3D"http://www.hagander.net/" target=3D"_blank">https://www.hagan=
der.net/</a><br>=C2=A0Work: <a href=3D"http://www.redpill-linpro.com/" targ=
et=3D"_blank">https://www.redpill-linpro.com/</a></div></div></div></div></=
div>

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