A DESCRIPTION OF THE REQUEST :
If you assume that sun.nio.ch.PipeImpl communicates over local TCP/IP sockets, PipeImpl should open a socket on and connect to over localhost.

JUSTIFICATION :
IPv4 has reaching the end of its use.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
If you assume that sun.nio.ch.PipeImpl communicates over local TCP/IP
sockets, PipeImpl should open a socket on and connect to over localhost.

sun.nio.ch.PipeImpl should use localhost instead of 127.0.0.1. RFC 6761
states that "[users] may assume that IPv4 and IPv6 address queries for
localhost names will always resolve to the respective IP loopback
address". This assumption is correct on all supported versions of
Microsoft Windows (in non-broken configurations).
ACTUAL -
sun.nio.ch.PipeImpl open a socket on and connects to 127.0.0.1.