Howdy, we investigated the APIs of java.net (OpenJDK Build b147) and published our findings in Ottawa Linux Symposium 2012:
http://nw.dreamhosters.com/ols/ols2012/ols2012-komu.pdf We two types of improvements to java.net disclosed in full detail in section 4.3.1 of the publication. First, we suggest to fix a bug related to UDP in multihoming scenarios (i.e., a host has multiple IP addresses). Second, we suggest improvements that can improve either the user experience (i.e. by improving latency in IPv6 environments) or developers (after all, frameworks are a conveniency for the developers). The suggestions for improvements are briefly summarized below. Multihoming bug --------------- * R3.2: Server-side multihoming for UDP does not work properly. The framework should use SO_BINDTODEVICE option or sendmsg()/recvmsg() interfaces in a proper way. Suggested improvements (for better end-user or developer experience) -------------------------------------------------------------------- * R2.2: The framework does not support parallel DNS look ups over IPv4 and IPv6 to optimize latency * R3.3: The framework does not support parallel connect() over IPv4 and IPv6 to minimize the latency for connection set-up Please refer to section 4.3.4 in the publication for a more elaborate discussion of the improvements.
