[Freeswitch-users] ESL connection lost to FS

Tue Apr 23 04:42:50 UTC 2019

Deepika,

I don't think this is the issue as we've had this pattern of code for years
and only recently (after upgrading to v1.8) have we seen ESL connection
instability. Note we took this pattern from Newfies which does exact same
thing
<https://github.com/newfies-dialer/newfies-dialer/blob/8168b3dd43e9f5ce73a2645b3229def1b2815d47/lua/dial.py#L31>.
Areski hasn't responded yet but I believe he would say this is not an issue.

We've adjusted our code to abort the attempt and retry if ev=None, but
there remains a portion of calls for which ev returns success but there is
actually no call originated and no trace of it in FS logs or in CDR.

Any other ideas?

On Mon, Apr 22, 2019 at 9:51 PM Deepika Yadav <deepikay at iiitd.ac.in> wrote:

> Hi Neil,
>
> Just a guess, shouldn't you put a significant sleep before
> "c.disconnect()". Since the previous command starts background api, it
> would be appropriate to introduce some time gap before disconnecting ESL.
>
> Regards,
> Deepika
> PhD Scholar
> IIIT Delhi <http://iiitd.ac.in/>, India
> Webpage: https://deepikay.wixsite.com/deepika
>
> On Mon, Apr 22, 2019 at 9:37 PM Neil Patel <neilp at cs.stanford.edu> wrote:
>
>> Hi Brian,
>>
>> Sorry, I didn't give enough context.
>>
>> The code below is for the origination of calls, which we are doing
>> through ESL and where the connection is being unexpectedly dropped, or even
>> if not dropped, no record of the origination appears in either FS logs or
>> CDR.
>>
>> CDRs are being generated to sqlite and we are reading them from there
>> asynchronously.
>>
>> Also forgot to link the documentation that suggests building from source
>> is the way, it's here
>> <https://freeswitch.org/confluence/display/FREESWITCH/Python+ESL>
>>
>> On Mon, Apr 22, 2019 at 6:25 PM Brian West <brian at freeswitch.com> wrote:
>>
>>> You're doing the CDR collection inline or what are you speaking of
>>> exactly?
>>>
>>> On Mon, Apr 22, 2019 at 2:29 AM Neil Patel <neilp at cs.stanford.edu>
>>> wrote:
>>>
>>>> Hi all, I have a fresh server running FS 1.8 from package on Debian 9.
>>>> It runs a python app connecting to FS using ESL that executes this code per
>>>> call attempt:
>>>>
>>>> c = ESLconnection(str(settings.ESL_HOSTNAME), str(settings.ESL_PORT),
>>>> str(settings.ESL_PASSWORD))
>>>> if not c.connected():
>>>>     abort()
>>>> dial_command = "originate …"
>>>> ev = c.api("bgapi", str(dial_command))
>>>> c.disconnect()
>>>> if ev:
>>>>     result = ev.serialize()
>>>>     logger.debug('API result = {}'.format(result))
>>>>
>>>>
>>>> When we ran 350K call test, 70K calls got to this code and failed the
>>>> final if condition, meaning ev was None. No CDR generated.
>>>>
>>>> This is totally an unexpected error case for us after tens of millions
>>>> of calls over last 3 years on our other servers. Any idea why this is
>>>> happening? The only difference I can see is we’ve not seen this issue on FS
>>>> 1.6 (built from source), so maybe it’s introduced in 1.8 (run from
>>>> package)? FYI we've built pyESL from source, which is what's recommended
>>>> here. Any chance there is an incompatibility between pyESL built from
>>>> source and FS 1.8 installed from package?
>>>>
>>>> Thanks,
>>>> Neil
>>>>
>>>> This question reproduced from Slack
>>>> <https://signalwire-community.slack.com/archives/CDC8H14PN/p1555508784091900>
>>>> where I didn't get a response
>>>>
>>>>
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>>
>> _________________________________________________________________________
>>
>> The FreeSWITCH project is sponsored by SignalWire https://signalwire.com
>> Enhance your FreeSWITCH install with disruptive priced SMS and PSTN
>> services.
>> Build your next product on our scalable cloud platform.
>>
>> Join our online community to chat in real time
>> https://signalwire.community
>>
>> Professional FreeSWITCH Services
>> sales at freeswitch.com
>> https://freeswitch.com
>>
>> Official FreeSWITCH Sites
>> https://freeswitch.com/oss
>> https://freeswitch.org/confluence
>> https://cluecon.com
>>
>> FreeSWITCH-users mailing list
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>> https://freeswitch.com
>
>
>
> --
> Regards,
> Deepika
> PhD Scholar
> IIIT Delhi <http://iiitd.ac.in/>, India
> Webpage: https://deepikay.wixsite.com/deepika
> _________________________________________________________________________
>
> The FreeSWITCH project is sponsored by SignalWire https://signalwire.com
> Enhance your FreeSWITCH install with disruptive priced SMS and PSTN
> services.
> Build your next product on our scalable cloud platform.
>
> Join our online community to chat in real time
> https://signalwire.community
>
> Professional FreeSWITCH Services
> sales at freeswitch.com
> https://freeswitch.com
>
> Official FreeSWITCH Sites
> https://freeswitch.com/oss
> https://freeswitch.org/confluence
> https://cluecon.com
>
> FreeSWITCH-users mailing list
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