[asterisk-users] stucked calls in asterisk 1.4

[Elliot Otchet]

Stefan,

I'm not sure if you've considered the underlying hardware, firmware, and device drivers yet, but I was brought in to evaluate a site under heavy load and was able to stabilize things by applying vendor supplied drivers and firmware to the system.

What is the underlying hardware (E.g. Dell PowerEdge 2950 Series 3, HP DL380G5, etc.) and OS distribution?

I've seen plenty of timing issues (and resulting kernel panics) due to outdated firmware or unsupported/inappropriate drivers.  To be clear, in most cases of brand named hardware, these will come from the manufacturer's repository (or website), not the OS distribution's.

For example, if you're on HP hardware with RHEL 5.X, you might want to check HP's website for the latest firmware and kernel modules (e.g. drivers) for your system.

Just a thought.

Regards,

Elliot

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Stefan Schmidt
Sent: Thursday, May 28, 2009 4:50 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] stucked calls in asterisk 1.4


David Backeberg schrieb:
> On Wed, May 27, 2009 at 1:49 PM, Stefan Schmidt <sst at sil.at> wrote:
>> all server are in one rack in our datacenter and are connected to an HP
>> Procurve 2650 switch, which has been setup around 3 months ago, cause of
>> the old switch died silent in the night.
>>
>> all server had two interfaces and i have allready tried to route the
>> traffic between the pbx and the routing server over the second
>> interface, where database requests normally run. But this didnt solved
>> the problem too.
>>
>> i will try to increase the UDP buffer size in the linux kernel, maybe
>> this will take some affect.
>
> I will say that asterisk-1.6 is supposed to have a better SIP stack
> than 1.4. Perhaps the difference in performance will help you.
> Specifically, check out:
>
> http://svn.digium.com/svn/asterisk/branches/1.6.0/CHANGES
> http://svn.digium.com/svn/asterisk/branches/1.6.1/CHANGES
>
> I'd recommend you go to at least 1.6.1.* series

i will have a look at 1.6.1 version but the problem is a network/kernel
problem.

i´ve tried to set the udp rcv buffer to 1mb but that didnt change the
problem.

what i can see is that the asterisk itself sometimes lag so no call can
be started, but running calls wont be broken.

in netstat -su i see a big amount of udp packet receive errors when it
lags. Like 600 to 800 pakets per second.

in syslog i cant see anything that would cause asterisk to react like this.

anyone an idea what can cause this problem?

best regards

steve

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