Graham, Default config means that multicast is used for discovery. Can you try static IP configuration [1] and see if the issue is reproduced?
[1] https://apacheignite.readme.io/docs/cluster-config#static-ip-based-discovery -Val -- View this message in context: http://apache-ignite-users.70518.x6.nabble.com/Nodes-running-on-different-operating-systems-tp5098p5126.html Sent from the Apache Ignite Users mailing list archive at Nabble.com.
