Hazelcast members and native Java clients can find each other with multicast discovery plugin. This plugin is implemented using Hazelcast Discovery SPI. You should configure the plugin both at Hazelcast members and Java clients in order to use multicast discovery.

To configure your cluster to have the multicast discovery plugin, follow these steps:

  • Disable the multicast and TCP/IP join mechanisms. To do this, set the enabled attributes of the multicast and tcp-ip elements to false in your hazelcast.xml configuration file
  • Set the enabled attribute of the hazelcast.discovery.enabled property to true.
  • Add multicast discovery strategy configuration to your XML file, i.e., <discovery-strategies> element.

The following is an example declarative configuration.

    <property name="hazelcast.discovery.enabled">true</property>
    <multicast enabled="false">
    <tcp-ip enabled="false">
        <discovery-strategy class="com.hazelcast.spi.discovery.multicast.MulticastDiscoveryStrategy" enabled="true">
          <property name="group"></property>
          <property name="port">54327</property>

The table below lists the multicast discovery plugin configuration properties with their descriptions.

Property Name Type Description
group String String value that is used to set the multicast group, so that you can isolate your clusters.
port Integer Integer value that is used to set the multicast port.