Please OS X (or whatever your name is) just fucking reset your DNS cache please
Q) What? Why?
A) "What if ping was different on every build of linux. Shit gets old." (HT post_break https://news.ycombinator.com/item?id=11902850)
Q) "… The
dscacheutil -flushcache command he lists for Snow Leopard still works for me (OS X Yosemite here)."
A) The command didn't fail, but it didn't clear the cache either: (HT masklinn https://news.ycombinator.com/item?id=11902754)