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

[Badalian Vyacheslav (JIRA)]

DNS long responce freeze chan_sip 
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                 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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