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https://issues.apache.org/jira/browse/TS-4220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15159959#comment-15159959
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ASF GitHub Bot commented on TS-4220:
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Github user scw00 commented on the pull request:
https://github.com/apache/trafficserver/pull/493#issuecomment-187988003
sry！！
> DNSHandler::mainEvent
> ---------------------
>
> Key: TS-4220
> URL: https://issues.apache.org/jira/browse/TS-4220
> Project: Traffic Server
> Issue Type: Bug
> Reporter: song
>
> Dear all
> failover_now return false when the name server's mark is not expiring, and
> we need to call rr_failure to mark the name server as down.
> Thx!!
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