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deploy rabbitmq cluster by train with ipv6 report: unable to connect to epmd (port 4369) on control-1: address (cannot connect to host/port) Closes-Bug: #1856725 Change-Id: I36ebb4e196ece8a304269e8c85e39dda72faae50 Signed-off-by: yj.bai <bai.yongjun@99cloud.net>