Hazelcast:禁用集群

Question

我在一个java项目上使用Hazelcast，但我只使用了一个节点，不想要任何集群。当几个开发实例相互发现并形成一个集群时，这实际上会给我们带来问题。

有没有办法在xml配置中完全禁用集群？

编辑:我使用的是Hazelcast 3.8.4，我试着像这样禁用多播，但它看起来仍然是启用的：

    <hz:hazelcast id="hazelcast">
        <hz:config>
            <hz:group name="dev" password="password"/>
            <hz:properties>
                <hz:property name="hazelcast.logging.type">slf4j</hz:property>
            </hz:properties>
            <hz:network port="5701" port-auto-increment="true">
                <hz:join>
                    <hz:multicast enabled="false"/>
                </hz:join>
            </hz:network>
            <hz:topic name="topicStuff"/>
        </hz:config>
    </hz:hazelcast>

日志：

12:54:51,273 INFO  [com.hazelcast.hibernate.HazelcastLocalCacheRegionFactory] - Starting up HazelcastLocalCacheRegionFactory
12:54:51,284 INFO  [com.hazelcast.config.XmlConfigLocator] - Loading 'hazelcast-default.xml' from classpath.
12:54:51,398 INFO  [com.hazelcast.instance.DefaultAddressPicker] - [LOCAL] [dev] [3.8.4] Prefer IPv4 stack is true.
12:54:51,409 INFO  [com.hazelcast.instance.DefaultAddressPicker] - [LOCAL] [dev] [3.8.4] Picked [10.212.134.200]:5701, using socket ServerSocket[addr=/0:0:0:0:0:0:0:0,localport=5701], bind any local is true 
12:54:51,426 INFO  [com.hazelcast.system] - [10.212.134.200]:5701 [dev] [3.8.4] Hazelcast 3.8.4 (20170809 - 297a77e) starting at [10.212.134.200]:5701
12:54:51,426 INFO  [com.hazelcast.system] - [10.212.134.200]:5701 [dev] [3.8.4] Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
12:54:51,426 INFO  [com.hazelcast.system] - [10.212.134.200]:5701 [dev] [3.8.4] Configured Hazelcast Serialization version : 1
12:54:51,648 INFO  [com.hazelcast.spi.impl.operationservice.impl.BackpressureRegulator] - [10.212.134.200]:5701 [dev] [3.8.4] Backpressure is disabled
12:54:52,088 INFO  [com.hazelcast.instance.Node] - [10.212.134.200]:5701 [dev] [3.8.4] Creating MulticastJoiner
12:54:52,219 INFO  [com.hazelcast.spi.impl.operationexecutor.impl.OperationExecutorImpl] - [10.212.134.200]:5701 [dev] [3.8.4] Starting 12 partition threads 
12:54:52,220 INFO  [com.hazelcast.spi.impl.operationexecutor.impl.OperationExecutorImpl] - [10.212.134.200]:5701 [dev] [3.8.4] Starting 7 generic threads (1 dedicated for priority tasks)
12:54:52,241 INFO  [com.hazelcast.core.LifecycleService] - [10.212.134.200]:5701 [dev] [3.8.4] [10.212.134.200]:5701 is STARTING
12:54:54,286 INFO  [com.hazelcast.system] - [10.212.134.200]:5701 [dev] [3.8.4] Cluster version set to 3.8
12:54:54,289 INFO  [com.hazelcast.internal.cluster.impl.MulticastJoiner] - [10.212.134.200]:5701 [dev] [3.8.4] 


Members [1] {   Member [10.212.134.200]:5701 - 820072f4-f1ef-4a5e-9722-eb2bd038f37e this }

12:54:54,361 INFO  [com.hazelcast.core.LifecycleService] - [10.212.134.200]:5701 [dev] [3.8.4] [10.212.134.200]:5701 is STARTEDsdf

Answer 1

当未启用join方法时，Hazelcast将以独立模式启动。在4.1版本之前，默认的加入方式是组播，当禁用时，成员将独立启动：

<network>
    <join>
        <multicast enabled="false"/>
    </join>
</network>

这会产生日志：

WARNING: [192.168.1.3]:5701 [dev] [4.0] No join method is enabled! Starting standalone.

在4.1版本中，这变成了

<network>
    <join>
        <auto-detection enabled="false"/>
    </join>
</network>