Aestek 02f991843f Fix race condition in DNS when using cache (#5398)
* Fix race condition in DNS when using cache

The healty node filtering was modifying the result from the cache, which
caused a crash when multiple queries were made to the same service
simultaneously.
We now copy the node slice before filtering to ensure we do not modify
the data stored in the cache.

* Fix wording in dns cache config doc

s/dns_max_age/cache_max_age/
2019-03-04 09:22:01 -05:00
..
2019-03-01 08:51:37 -06:00
2019-02-20 18:27:28 -06:00