[asterisk-bugs] [JIRA] Closed: (ASTERISK-20317) DNS long responce freeze chan_sip

[Matt Jordan (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-20317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matt Jordan closed ASTERISK-20317.
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    Resolution: Won't Fix

Asterisk does not implement an asynchronous DNS resolver.  A local DNS cache has been used in the past to work around this issue.

An asynchronous DNS resolver technically constitutes an improvement or a new feature, and as such, would require a patch to trunk.

> DNS long responce freeze chan_sip 
> ----------------------------------
>
>                 Key: ASTERISK-20317
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20317
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/Registration
>    Affects Versions: 1.8.15.0
>            Reporter: Badalian Vyacheslav
>            Severity: Critical
>
> Hello.
> Test stand:
> 200 Voip phones. All host=dynamic. All use registration to connect to Asterisk. All connect by IP (not use DNS)
> 3 SIP peers. All host=NAME (use DNS). Asterisk use registration for this peers. 
> Test:
> - DNS return errror after 10 sec timeout (NS server of peer zone is down.)
> That's must be - Asterisk can't connect to peers. All voip phones work normal. 
> That's was - over 70% of voip phones are unreacheble, becouse chan_sip is deadlocked by waiting answer for peers.
> Please fix. One broken peer may will down all system!

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