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From: Luca Toscano <toscano.luca@gmail.com>
Date: Wed, 19 Jul 2017 17:48:30 +0200
Message-ID: <CAFedD40AVKLCcUW9496hc1OPfuxhEMNYBOTw3D=v8QTSv6J+1g@mail.gmail.com>
Subject: Re: [Bug 60956] Event MPM listener thread may get blocked by SSL shutdowns
To: Apache HTTP Server Development List <dev@httpd.apache.org>
Cc: Yann Ylavic <ylavic.dev@gmail.com>
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archived-at: Wed, 19 Jul 2017 15:48:40 -0000

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Hello Stefan,

2017-07-19 17:05 GMT+02:00 Stefan Priebe - Profihost AG <
s.priebe@profihost.ag>:

>
> Am 19.07.2017 um 16:59 schrieb Stefan Priebe - Profihost AG:
> > Hello Yann,
> >
> > i'm observing some deadlocks again.
> >
> > I'm using
> > httpd 2.4.27
> > + mod_h2
> > + httpd-2.4.x-mpm_event-wakeup-v7.1.patch
> > + your ssl linger fix patch from this thread
> >
> > What kind of information do you need? If you need a full stack backtrace
> >  - from which pid? Or from all httpd pids?
>
> Something i forgot to tell:
>
> it seems httpd is running at max threads:
> awk '{print $10 $11}' lsof.txt | sort | uniq -c | grep LISTEN
>   25050 *:http(LISTEN)
>   25050 *:https(LISTEN)
>
>
First of all let me tell you how awesome is your regular testing, thank
you! It is helping a ton to deliver stable code :)

From my point of view I think that you can attach gdb to one or more httpd
processes and do the usual "thread apply all", IIUC your httpd ends up
having all of its processes in more or less the same state right?

Let's use https://apaste.info/ or similar though otherwise we'll need to
exchange super long emails.

Thanks again!

Luca

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<div dir=3D"ltr">Hello Stefan,<br><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">2017-07-19 17:05 GMT+02:00 Stefan Priebe - Profihost AG <s=
pan dir=3D"ltr">&lt;<a href=3D"mailto:s.priebe@profihost.ag" target=3D"_bla=
nk">s.priebe@profihost.ag</a>&gt;</span>:<br><blockquote class=3D"gmail_quo=
te" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204=
);padding-left:1ex"><span class=3D"gmail-"><br>
Am 19.07.2017 um 16:59 schrieb Stefan Priebe - Profihost AG:<br>
&gt; Hello Yann,<br>
&gt;<br>
&gt; i&#39;m observing some deadlocks again.<br>
&gt;<br>
&gt; I&#39;m using<br>
&gt; httpd 2.4.27<br>
&gt; + mod_h2<br>
&gt; + httpd-2.4.x-mpm_event-wakeup-<wbr>v7.1.patch<br>
&gt; + your ssl linger fix patch from this thread<br>
&gt;<br>
&gt; What kind of information do you need? If you need a full stack backtra=
ce<br>
&gt;=C2=A0 - from which pid? Or from all httpd pids?<br>
<br>
</span>Something i forgot to tell:<br>
<br>
it seems httpd is running at max threads:<br>
awk &#39;{print $10 $11}&#39; lsof.txt | sort | uniq -c | grep LISTEN<br>
=C2=A0 25050 *:http(LISTEN)<br>
=C2=A0 25050 *:https(LISTEN)<br><div class=3D"gmail-HOEnZb"><div class=3D"g=
mail-h5"><br></div></div></blockquote><div><br></div><div>First of all let =
me tell you how awesome is your regular testing, thank you! It is helping a=
 ton to deliver stable code :)</div><div><br></div><div>From my point of vi=
ew I think that you can attach gdb to one or more httpd processes and do th=
e usual &quot;thread apply all&quot;, IIUC your httpd ends up having all of=
 its processes in more or less the same state right?</div><div><br></div><d=
iv>Let&#39;s use <a href=3D"https://apaste.info/">https://apaste.info/</a> =
or similar though otherwise we&#39;ll need to exchange super long emails.</=
div><div><br></div><div>Thanks again!</div><div><br></div><div>Luca =C2=A0<=
/div></div></div></div>

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