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Leonid Fainshtein

2020-Aug-27 12:23 UTC

[asterisk-users] PJSIP trunk is down when DNS was not available during the Asterisk start.

I deleted the res_resolver_unbound.so module, and now it works as expected.
So, the problem is related to the 'unbound' resolver?
FYI: I'm using Asterisk 16.2 installed from Debian 10 repository.

Best regards,
Leonid Fainshtein

On Thu, Aug 27, 2020 at 3:01 PM Joshua C. Colp <jcolp at sangoma.com>
wrote:
> On Thu, Aug 27, 2020 at 8:58 AM Leonid Fainshtein <
> leonid.fainshtein at xorcom.com> wrote:
>
>> I see that pjsip_resolver.c tries unsuccessfuly to resolve the
>> hostname each 10 seconds:
>>
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: Wrapper
created
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: Set timer to
>> 2000 msec
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: Performing SIP
>> DNS resolution of target 'rpi6.in.xorcom.com'
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: Transport type
>> for target 'rpi6.in.xorcom.com' is 'Unspecified'
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c:
[0x7f75282fe7f8]
>> Created resolution tracking for target 'rpi6.in.xorcom.com'
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c:
[0x7f75282fe7f8]
>> Added target 'rpi6.in.xorcom.com' with record type
'35', transport
>> 'Unspecified', and port '0'
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c:
[0x7f75282fe7f8]
>> Added target '_sips._tcp.rpi6.in.xorcom.com' with record type
'33',
>> transport 'TLS', and port '5061'
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c:
[0x7f75282fe7f8]
>> Added target '_sip._tcp.rpi6.in.xorcom.com' with record type
'33',
>> transport 'TCP', and port '5060'
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c:
[0x7f75282fe7f8]
>> Added target '_sip._udp.rpi6.in.xorcom.com' with record type
'33',
>> transport 'UDP', and port '5060'
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c:
[0x7f75282fe7f8]
>> Added target 'rpi6.in.xorcom.com' with record type '1',
transport 'UDP',
>> and port '5060'
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c:
[0x7f75282fe7f8]
>> Starting initial resolution using parallel queries for target '
>> rpi6.in.xorcom.com'
>> [Aug 27 07:51:36] DEBUG[605] res_pjsip/pjsip_resolver.c:
[0x7f75282fe7f8]
>> All parallel queries completed
>> [Aug 27 07:51:36] DEBUG[605] res_pjsip/pjsip_resolver.c:
[0x7f75282fe7f8]
>> Resolution completed - 0 viable targets
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c:
[0x7f75282fe7f8]
>> Invoking user callback with '0' addresses
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: PJSIP tsx
>> response received
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: Cancelling
>> timer
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: Timer
cancelled
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: Callbacks
>> executed
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: wrapper
>> destroyed
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_options.c: Contact
g145/sip:
>> rpi6.in.xorcom.com status didn't change: Unreachable, RTT: 0.000
msec
>> [Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_options.c: AOR
'g145' now
>> has 0 available contacts
>>
>> But a DNS server is available at this time:
>> # host rpi6.in.xorcom.com
>> rpi6.in.xorcom.com has address 192.168.0.175
>>
>> # ping rpi6.in.xorcom.com
>> PING rpi6.in.xorcom.com (192.168.0.175) 56(84) bytes of data.
>> 64 bytes from rpi6.in.xorcom.com (192.168.0.175): icmp_seq=1 ttl=64
>> time=0.990 ms
>>
>
> What DNS resolver implementation is in use? system or unbound?
>
> Asterisk itself doesn't do any caching, we defer it to the underlying
> implementation. It could be caching a negative response.
>
> --
> Joshua C. Colp
> Asterisk Technical Lead
> Sangoma Technologies
> Check us out at www.sangoma.com and www.asterisk.org
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> Check out the new Asterisk community forum at:
> https://community.asterisk.org/
>
> New to Asterisk? Start here:
>       https://wiki.asterisk.org/wiki/display/AST/Getting+Started
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users-------------- next part --------------
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Joshua C. Colp

2020-Aug-27 12:28 UTC

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[asterisk-users] PJSIP trunk is down when DNS was not available during the Asterisk start.

On Thu, Aug 27, 2020 at 9:24 AM Leonid Fainshtein <
leonid.fainshtein at xorcom.com> wrote:
> I deleted the res_resolver_unbound.so module, and now it works as expected.
> So, the problem is related to the 'unbound' resolver?
> FYI: I'm using Asterisk 16.2 installed from Debian 10 repository.
>
It would be a result of behavior within the unbound resolver library. Our
module is a thin wrapper over it.

-- 
Joshua C. Colp
Asterisk Technical Lead
Sangoma Technologies
Check us out at www.sangoma.com and www.asterisk.org
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Leonid Fainshtein

2020-Aug-27 12:34 UTC

head link

[asterisk-users] PJSIP trunk is down when DNS was not available during the Asterisk start.

Is it possible to disable the unbond resolver in the asterisk
configuration? Or, it is necessary just to disable the module?
Best regards,
Leonid Fainshtein



On Thu, Aug 27, 2020 at 3:29 PM Joshua C. Colp <jcolp at sangoma.com>
wrote:
> On Thu, Aug 27, 2020 at 9:24 AM Leonid Fainshtein <
> leonid.fainshtein at xorcom.com> wrote:
>
>> I deleted the res_resolver_unbound.so module, and now it works as
>> expected.
>> So, the problem is related to the 'unbound' resolver?
>> FYI: I'm using Asterisk 16.2 installed from Debian 10 repository.
>>
>
> It would be a result of behavior within the unbound resolver library. Our
> module is a thin wrapper over it.
>
> --
> Joshua C. Colp
> Asterisk Technical Lead
> Sangoma Technologies
> Check us out at www.sangoma.com and www.asterisk.org
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> Check out the new Asterisk community forum at:
> https://community.asterisk.org/
>
> New to Asterisk? Start here:
>       https://wiki.asterisk.org/wiki/display/AST/Getting+Started
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users-------------- next part --------------
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