This plugin provides a service based discovery strategy by using Apache Curator to communicate with your Zookeeper server. You can use this plugin with Discovery SPI enabled Hazelcast 3.6.1 and higher applications.
<hazelcast xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.hazelcast.com/schema/config
http://www.hazelcast.com/schema/config/hazelcast-config-3.6.xsd"
xmlns="http://www.hazelcast.com/schema/config">
<properties>
<property name="hazelcast.discovery.enabled">true</property>
</properties>
<network>
<join>
<multicast enabled="false"/>
<tcp-ip enabled="false" />
<aws enabled="false"/>
<discovery-strategies>
<discovery-strategy enabled="true" class="com.hazelcast.zookeeper.ZookeeperDiscoveryStrategy">
<properties>
<!--
Connection string to your ZooKeeper server.
Default: There is no default, this is a required property.
Example: 127.0.0.1:2181
-->
<property name="zookeeper_url">{ip-address-of-zookeeper}:{port-of-zookeeper}</property>
<!--Path in ZooKeeper Hazelcast will useDefault: /discovery/hazelcast -->
<property name="zookeeper_path">{path-on-zookeeper}</property>
<!--Name of this Hazelcast cluster. You can have multiple distinct clusters to use the same ZooKeeper installation.-->
<property name="group">{clusterId}</property>
</properties>
</discovery-strategy>
</discovery-strategies>
</join>
</network>
</hazelcast><hazelcast-client xsi:schemaLocation="http://www.hazelcast.com/schema/client-config hazelcast-client-config-3.6.xsd"
xmlns="http://www.hazelcast.com/schema/client-config"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<properties>
<property name="hazelcast.discovery.enabled">true</property>
</properties>
<network>
<aws enabled="false"/>
<smart-routing>true</smart-routing>
<redo-operation>true</redo-operation>
<discovery-strategies>
<discovery-strategy enabled="true" class="com.hazelcast.zookeeper.ZookeeperDiscoveryStrategy">
<properties>
<!--
Connection string to your ZooKeeper server.
Default: There is no default, this is a required property.
Example: 127.0.0.1:2181
-->
<property name="zookeeper_url">{ip-address-of-zookeeper}:{port-of-zookeeper}</property>
<!--Path in ZooKeeper Hazelcast will useDefault: /discovery/hazelcast -->
<property name="zookeeper_path">{path-on-zookeeper}</property>
<!--Name of this Hazelcast cluster. You can have multiple distinct clusters to use the same ZooKeeper installation.-->
<property name="group">{clusterId}</property>
</properties>
</discovery-strategy>
</discovery-strategies>
</network>
</hazelcast-client>public static void main(String[] args) {
String zookeeperURL = "{ip-address-of-zookeeper}:{port-of-zookeeper}";
Config config = new Config();
config.getNetworkConfig().getJoin().getMulticastConfig().setEnabled(false);
config.setProperty(GroupProperty.DISCOVERY_SPI_ENABLED, "true");
DiscoveryStrategyConfig discoveryStrategyConfig = new DiscoveryStrategyConfig(new ZookeeperDiscoveryStrategyFactory());
discoveryStrategyConfig.addProperty(ZookeeperDiscoveryProperties.ZOOKEEPER_URL.key(), "{ip-address-of-zookeeper}:{port-of-zookeeper}");
discoveryStrategyConfig.addProperty(ZookeeperDiscoveryProperties.ZOOKEEPER_PATH.key(), "{path-on-zookeeper}");
discoveryStrategyConfig.addProperty(ZookeeperDiscoveryProperties.GROUP.key(), "{clusterId}");
config.getNetworkConfig().getJoin().getDiscoveryConfig().addDiscoveryStrategyConfig(discoveryStrategyConfig);
Hazelcast.newHazelcastInstance(config);
} ClientConfig config = new ClientConfig();
config.getNetworkConfig().getAwsConfig().setEnabled(false);
config.setProperty(GroupProperty.DISCOVERY_SPI_ENABLED, "true");
DiscoveryStrategyConfig discoveryStrategyConfig = new DiscoveryStrategyConfig(new ZookeeperDiscoveryStrategyFactory());
discoveryStrategyConfig.addProperty(ZookeeperDiscoveryProperties.ZOOKEEPER_URL.key(), "{ip-address-of-zookeeper}:{port-of-zookeeper}");
discoveryStrategyConfig.addProperty(ZookeeperDiscoveryProperties.ZOOKEEPER_PATH.key(), "{path-on-zookeeper}");
discoveryStrategyConfig.addProperty(ZookeeperDiscoveryProperties.GROUP.key(), "{clusterId}");
config.getNetworkConfig().getDiscoveryConfig().addDiscoveryStrategyConfig(discoveryStrategyConfig);
HazelcastClient.newHazelcastClient(config);<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
...
<dependencies>
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-test</artifactId>
<version>${curator.version}</version>
</dependency>
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-x-discovery</artifactId>
<version>${curator.version}</version>
</dependency>
<dependency>
<groupId>com.hazelcast</groupId>
<artifactId>hazelcast-zookeeper</artifactId>
<version>${hazelcast.version}</version>
</dependency>
<dependency>
<groupId>com.hazelcast</groupId>
<artifactId>hazelcast</artifactId>
<version>${hazelcast.version}</version>
</dependency>
<dependency>
<groupId>com.hazelcast</groupId>
<artifactId>hazelcast-client</artifactId>
<version>${hazelcast.version}</version>
<dependency>
</dependencies>
...
</project>In order for the hazelcast-zookeeper plugin to work for the Hazelcast Java client, you need to use Hazelcast Client 3.6.1 or higher.
hazelcast-zookeeper-3.6.3 has been tested with Curator 2.9.0 and Zookeeper 3.4.6
Current Snapshot version of hazelcast-zookeeper has been tested with Curator 4.0.1 and Zookeeper 3.5.3-beta
There is an issue between zookeeper and curator client in some versions. You may get Received packet at server of unknown type 15 error.