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Re: Serious problem with read_timeout

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Le 11/04/2012 20:37, Jean-Philippe Menil a écrit :
On 11/04/2012 14:49, Amos Jeffries wrote:
On 11/04/2012 6:47 p.m., Jean-Philippe Menil wrote:
Le 05/04/2012 16:50, Jean-Philippe Menil a écrit :
Le 04/04/2012 09:00, Jean-Philippe Menil a écrit :
On 03/04/2012 23:53, Amos Jeffries wrote:
On 04.04.2012 02:46, Jean-Philippe Menil wrote:
Le 03/04/2012 11:06, Jean-Philippe Menil a écrit :
Hi,

i encounter serious outage with squid 3.HEAD-20120307-r12077.
Every time i download some test files, it stop after 15 minutes.
If i go down read_timeout to 1 minutes, the download stop after 1
minutes.

Is it a know issue, or must i increment read_timeout to excessively
timeout?

special configuration is as follow:

workers 4
cpu_affinity_map process_numbers=1,2,3,4 cores=6,7,8,9

Regards.

Nobody have ever observe this phenomen?

Not many production networks (squid-users people) use 3.HEAD
(alpha) code.
The developers and alpha/beta testers hang out in squid-dev ;)

And no, you are the first to mention this particular behaviour.

Amos

Hi,

yes iknow, but i think it is present in 3.2 too (i will test this
afternoon to confirm).
I think i can repeat that only when download a file to on a https
site, does it help?

Regards.

Hi,

so i have done test with a squid 3.2.0.14.
And it appear that i can repeat the problem only with https site, why
i don't know yet.

For test, i fixe a lower value (don't want to wait 15 minutes between
each test) for read_timeout,
and i download an iso file through some https site:
https://nzdis.org/projects/projects/perfnet/repository/revisions/4/raw/vendor/Vyatta/Vyatta/vyatta-livecd-vc5.0.2.iso


Every time, the download stop at the read_timeout value.

Any ideas?

Regards.



Hi,

sorry to up this subject, but i can't understand why the
read_timeout isn't zeroed with https communication.
Do i miss something?


Read timeout should be reset to full on every packet read. It is never
zeroed during a transfer.

My fault, bad semantic language, i mean reset, effectively.

It sounds like the transfer is stalling for more than read timeout, or
the timeout is not being reset like it should be.

Do you know, how i can troubleshoot this issue?

Amos

Many thanks.
Regards

Hi Amos,

I think i got it:

i still encounter the problem with 3.2.0.17.
I can easily repeat with the following parameter
read_timeout 30 seconds

wget --no-check-certificate https://nzdis.org/projects/projects/perfnet/repository/revisions/4/raw/vendor/Vyatta/Vyatta/vyatta-livecd-vc5.0.2.iso -O /dev/null

The donwload will stop on the fixed read_timeout.

With the following (obvious) patch, the download don't stop anymore:

01-build64:/home/menil-jp/squid-3.2.0.17# diff src/tunnel.cc /tmp/squid-3.2.0.17/src/tunnel.cc
321,326d320
<     if (Comm::IsConnOpen(to.conn)) {
<     AsyncCall::Pointer timeoutCall = commCbCall(5, 4, "tunnelTimeout",
<                      CommTimeoutCbPtrFun(tunnelTimeout, this));
<     commSetConnTimeout(to.conn, Config.Timeout.read, timeoutCall);
<     }
<
333,336c327,330
<     /* Only close the remote end if we've finished queueing data to it */
<     if (from.len == 0 && Comm::IsConnOpen(to.conn) ) {
<         to.conn->close();
<     }
---
> /* Only close the remote end if we've finished queueing data to it */
>         if (from.len == 0 && Comm::IsConnOpen(to.conn) ) {
>             to.conn->close();
>         }

Can you confirm the problem?

Best regards.

--
Jean-Philippe Menil - Pôle réseau Service IRTS
DSI Université de Nantes
jean-philippe.menil@xxxxxxxxxxxxxx
Tel : 02.53.48.49.27 - Fax : 02.53.48.49.09



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