[pve-devel] pveproxy: I might have discovered a bug

[Alexandre DERUMIER]

I'm not sure, but maybe it's comming from http_request() from pveproxy to pvedaemon

from http://search.cpan.org/~gaas/HTTP-Message-6.06/lib/HTTP/Request.pm

"
persistent => $boolean
Try to create/reuse a persistent connection. When this flag is set (default: true for idempotent requests, false for all others), then http_request tries to re-use an existing (previously-created) persistent connection to the host and, failing that, tries to create a new one.

Requests failing in certain ways will be automatically retried once, which is dangerous for non-idempotent requests, which is why it defaults to off for them. The reason for this is because the bozos who designed HTTP/1.1 made it impossible to distinguish between a fatal error and a normal connection timeout, so you never know whether there was a problem with your request or not.

When reusing an existent connection, many parameters (such as TLS context) will be ignored. See the session parameter for a workaround.
"


If I understand, by default, GET from proxy to pvedaemon are retried if pvedaemon timeout.




----- Mail original ----- 

De: "Michael Rasmussen" <mir at datanom.net> 
À: "Dietmar Maurer" <dietmar at proxmox.com> 
Cc: "Alexandre DERUMIER" <aderumier at odiso.com>, pve-devel at pve.proxmox.com 
Envoyé: Dimanche 23 Juin 2013 11:57:11 
Objet: Re: [pve-devel] pveproxy: I might have discovered a bug 

On Sun, 23 Jun 2013 05:55:44 +0000 
Dietmar Maurer <dietmar at proxmox.com> wrote: 

> 
> I also observed repeated (POST) calls last week, but was unable to find the bug. 
> Is it possible to assamble an easy test case for that to reproduce the bug? 
> 
My best guess is that time is the triggering factor. To produce a test 
case requires therefore that a method is created which runs for say 1 
minut before responding. I think what we see is an AJAX call which is 
running longer than a configured timeout in which case it is considered 
a broken link and therefore a new request is made to the backend. 

-- 
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Michael Rasmussen 

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