Get the Master Ip Address from Hazelcast grid

Question

I would like to get the masterIpAddress use on the Hazelcast node in HazelcastInsatnceImpl from an instance HazelcastInsatnce.

Somebody know how to do that?

Thanks for your help

Destefano

Answer 1

There is no real master in Hazelcast clusters. The oldest node plays some kind of a special role so you can imagine this one as the "master".

To get this node get retrieve the first element from the memberlist.

Cluster cluster = hazelcastInstance.getCluster();
Set<Member> members = cluster.getMembers();
Member master = members.iterator().next();

Gyration

Means what? What happens or does not happen? – Gyration

cluster.getMembers() now returns a Set. The docs still state that the first element is the oldest Member, so the equivalent code is now cluster.getMembers().iterator().next(). – Driest

Oh right, forgot about the change, thanks for pointing it out. Changed the example above! Really appreciated. – Gyration