stud segfaulting

[hikebuild]

[256971.486873] stud[26945]: segfault at 2d62f7b0 ip 000000002d62f7b0 sp 00007fff6f275ac8 error 15

Happens frequently on my servers right now.

[vikrum]

We saw segfaults occurring when stud attempts to handle more than 65k connections to a single backend (src/dest tuple limit). We got around it by sharding across 127.0.0.2, 127.0.0.3, ... fronted by the same stud instance.