[asterisk-bugs] [JIRA] (ASTERISK-27247) Asterisk not responding for 5 to 15 seconds

[Charlie Smurthwaite (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-27247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=238453#comment-238453 ] 

Charlie Smurthwaite commented on ASTERISK-27247:
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It appears that my issue was likely the result of a DNS name (used by a SIP provider I peer with) not responding in a timely manner, causing long hangs while Asterisk waited for a DNS response. I have confirmed via IRC that Daniel Journo peers with the same provider and I would suggest that this is possibly the underlying cause of both of our issues. If I'm correct, I would suggest the correct solution is some form of negative DNS caching in the resolver that Asterisk uses. I have not seen any further issues since blacklisting the domain name in my DNS, but I will keep an eye on things. Thanks to everyone on IRC for the assistance with this.

> Asterisk not responding for 5 to 15 seconds
> -------------------------------------------
>
>                 Key: ASTERISK-27247
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27247
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_pjsip
>    Affects Versions: 13.5.0
>            Reporter: Daniel Journo
>
> Asterisk is randomly stopping to respond to inbound SIP packets every so often. The outage lasts for about 10 to 15 seconds. During that time, Asterisk is still able to send OPTIONS, but doesnt respond to REGISTERs and INVITEs. 
> This is happening to two servers. Both servers have been running for over 4 months without this issue occurring. No config changes were made when the issue started.
> George Joseph will be attaching a packet capture showing the issue. Due to the random frequency of the issue, it's almost impossible to obtain a running core dump while the issue is occurring.



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