Question

尝试在独立进程上启用tcp-ip设置HazelCast群集。我的班级看起来像这样

public class Person implements Serializable{
 private static final long serialVersionUID = 1L;
 int    personId;
 String name;
 Person(){};
 //getters and setters
}

Hazelcast已加载为

final Config config = createNewConfig(mapName);
HazelcastInstance node = Hazelcast.newHazelcastInstance(config);`

Config createNewConfig(mapName){
final PersonStore personStore = new PersonStore();
  XmlConfigBuilder configBuilder = new XmlConfigBuilder();


Config config = configBuilder.build();
  config.setClassLoader(LoadAll.class.getClassLoader());
  MapConfig mapConfig = config.getMapConfig(mapName);
  MapStoreConfig mapStoreConfig = new MapStoreConfig();
  mapStoreConfig.setImplementation(personStore);
  return config;
}

我的myhazelcast配置有这个

<tcp-ip enabled="true">
                <member>machine-1</member>
                <member>machine-2</member>
</tcp-ip>

我是否需要在xml中填充此标记？

第二个实例启动时出现此错误

com.hazelcast.nio.serialization.HazelcastSerializationException: No DataSerializerFactory registered for namespace: 0
   2275     at com.hazelcast.nio.serialization.DataSerializer.read(DataSerializer.java:98)
   2276     at com.hazelcast.nio.serialization.DataSerializer.read(DataSerializer.java:39)
   2277     at com.hazelcast.nio.serialization.StreamSerializerAdapter.read(StreamSerializerAdapter.java:41)
   2278     at com.hazelcast.nio.serialization.SerializationServiceImpl.toObject(SerializationServiceImpl.java:276)

任何帮助都非常有用。

Answer 1

解决了我的问题，我有一个带有hazelcast-wm的pom.xml，所以我在捆绑的jar中没有真正的hazelcast jar。包括那个解决了我的问题。

Answer 2

请注意，当您尝试在同一个VM中使用多个Hazelcast实例但是从不同的bundle初始化实例时，OSGi环境中也会出现同样的“No DataSerializerFactory注册为namespace：0”错误消息。原因是com.hazelcast.util.ServiceLoader.findHighestReachableClassLoader（）方法有时会在Hazelcast初始化期间选择错误的类加载器（因为它不会总是选择你在配置上设置的类加载器），然后它最终使用DataSerializerFactory实例的空列表（因此导致错误消息，它无法找到ID为0的请求工厂）。以下显示了一种利用Java的上下文类加载器解决该问题的方法：

private HazelcastInstance createHazelcastInstance() {  

    // Use the following if you're only using the Hazelcast data serializers   
    final ClassLoader classLoader = Hazelcast.class.getClassLoader();

    // Use the following if you have custom data serializers that you need
    // final ClassLoader classLoader = this.getClass().getClassLoader();

    final com.hazelcast.config.Config config = new com.hazelcast.config.Config();
    config.setClassLoader(classLoader);
    final ClassLoader previousContextClassLoader = Thread.currentThread().getContextClassLoader();
    try {
        Thread.currentThread().setContextClassLoader(classLoader);
        return Hazelcast.newHazelcastInstance(config);
    } finally {
        if(previousContextClassLoader != null) {
            Thread.currentThread().setContextClassLoader(previousContextClassLoader);
        }
    }
}

Hazelcast No DataSerializerFactory在独立进程

2 个答案: