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Review request for geode, anilkumar gingade, Hitesh Khamesra, Jason Huynh, and Jianxia Chen. Repository: geode Description ------- JGroups is selecting an IPv6 multicast address, translating the given IPv4 mcast address into an equivalent IPv6 address, but this doesn't work on all machines and so causes all multicast messages to be dropped. The fix is to tell JGroups it is using an IPv4 stack unless the preferIPv6Addresses property is set. I'm also disabling use of multicast except in the case where it has been requested for cache operations. JGroups will still be used to send certain broadcast messages but it will be via point-to-point UDP instead of multicast. Diffs ----- gemfire-core/src/main/java/com/gemstone/gemfire/distributed/internal/DistributionManager.java 247775d82851ea63845ee27a6ceb8e0a3f81833f gemfire-core/src/main/java/com/gemstone/gemfire/distributed/internal/membership/gms/messenger/JGroupsMessenger.java 8ac8f77c0a76a79d36ec1d87cf61d391361a58f4 gemfire-core/src/main/java/com/gemstone/gemfire/internal/cache/GemFireCacheImpl.java cd7376d2bcb89e4b774694982b3dab8092252ae6 Diff: https://reviews.apache.org/r/40611/diff/ Testing ------- tested with both IPv4 and IPv6 Thanks, Bruce Schuchardt
