Given that JDK-8058965 removed the IPv6 support from TwoStacksPlainSocketImpl, the native socketListen method no longer needs to deal with the non-IPv4 code path. This simplifies the code, brings it in line with the unix variants, and removes a possible problematic code path that could close the socket without notifying the socket cleaner.
http://cr.openjdk.java.net/~chegar/8200181.00/ https://bugs.openjdk.java.net/browse/JDK-8200181 -Chris. [1] https://bugs.openjdk.java.net/browse/JDK-8058965
