Github user jpeach commented on the issue:
https://github.com/apache/trafficserver/pull/740
@SolidWallOfCode I filed
[TS-4574](https://issues.apache.org/jira/browse/TS-4574) to clear the explicit
address. However now that I know a bit more about how the DNS resolutions
works, the patch there is not really sufficient.
FWIW my current code samples the first DNS address before setting any
addresses and restores that if all else fails. For now I'm giving up DNS RR.
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