[asterisk-bugs] [JIRA] (ASTERISK-25570) DNS: Implement negative connection cache

[Kevin Harwell (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-25570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on ASTERISK-25570 started by Kevin Harwell.

> DNS: Implement negative connection cache
> ----------------------------------------
>
>                 Key: ASTERISK-25570
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-25570
>             Project: Asterisk
>          Issue Type: Improvement
>      Security Level: None
>          Components: Core/DNS
>            Reporter: Ashley Sanders
>            Assignee: Kevin Harwell
>            Severity: Critical
>
> What is this? If Asterisk is told to look up a domain, and that domain does not resolve, then Asterisk will temporarily return an error when that domain is looked up. This way, if tons of lookups are attempted, only the first will take time to fail. All subsequent ones will result in an immediate failure since we have cached the failure locally.



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