[Freeswitch-users] Limit [ERROR] question

[DJB International]

Thank you, Rupa.  I will try to change it to hash and see what happen.

Just curiosity, is there any advantage/disadvantage using hash vs. db.  I am
currently not doing any cluster.  I picked mod_db because it was mentioned
first in the Wiki/Limit :)

Dorn.

On Tue, Oct 19, 2010 at 9:00 AM, Rupa Schomaker <rupa at rupa.com> wrote:

> Thanks for the response.  From re-reviewing the code, I can't see how this
> error can occur in actual usage.  I don't see a code path where the callback
> handler would be called without a corresponding backend set.
>
> Without knowing how this condition is occurring I can't say whether adding
> traffic would increase the rate at which you see the error nor how to go
> about preventing the error.
>
> One question: you are using the db backend.  I assume this is because you
> have a cluster of machines?  If not, maybe try the hash backend and see if
> you get different behavior?
>
> The code in question should not depend on the backend but maybe try "just
> in case".
>
>
> On Tue, Oct 19, 2010 at 10:23 AM, DJB International <djbinter at gmail.com>wrote:
>
>> Rupa,
>>
>> Thank you for your clear response.
>>
>> This issue happened to be on my production server.  I can reproduce since
>> it happened almost every day, but only happened to 1-2 calls max out of many
>> concurrent calls.  Thus, I am not that concern right now until I started to
>> see more of this error.
>>
>> I use limit just to keep track of concurrent calls per each gateway
>> similar to below:
>>
>> For inbound:
>> <action application="limit" data="db inbound 5.6.7.8 10000"/>
>>
>> For outbound:
>> <action application="limit_execute" data="db outbound 1.2.3.4 10000 bridge
>> sofia/gateway/1.2.3.4/${destination_number}<http://1.2.3.4/$%7Bdestination_number%7D>"
>> />
>>
>> My next question would be whether it would generate more of this errors if
>> I routed more calls to this server, and if there is any recommendation on
>> how to prevent it.
>>
>> Thank you,
>> Dorn.
>>
>>
>>
>> On Tue, Oct 19, 2010 at 5:56 AM, Rupa Schomaker <rupa at rupa.com> wrote:
>>
>>> This is a "shouldn't happen" sanity check you are tripping over -- I
>>> probably should have worded the error message better.
>>>
>>> Immediate cause is that the list of backends (hash, sql, etc) that have
>>> registered interest in this call is empty.   This shouldn't happen because
>>> we register the handler at the same time that we set the channel var of
>>> interested backends.
>>>
>>> Can you find a way to reproduce this reliably?
>>>
>>> The effect of this would be to (potentially) not decrement a counter when
>>> we should have.
>>>
>>> On Mon, Oct 18, 2010 at 7:31 PM, DJB International <djbinter at gmail.com>wrote:
>>>
>>>> I have noticed once in a while in the log file with the following error:
>>>>
>>>> [ERR] switch_limit.c:86 Unset limit backendlist!
>>>>
>>>> What exactly would cause this error?
>>>>
>>>> Thank you,
>>>> Dorn B.
>>>>
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>>>
>>>
>>> --
>>> -Rupa
>>>
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>>
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>
>
> --
> -Rupa
>
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