Hazelcast ClassNotFound使用客户端中的近缓存

Question

<replicatedmap name="default">
    <in-memory-format>BINARY</in-memory-format>
    <statistics-enabled>true</statistics-enabled>
</replicatedmap>

我的客户端代码看起来是这样的（Cache只是一个没有属性的可序列化类）：

public class Main {
  public static final String HAZELCAST_INSTANCE_NAME = "HAZI";
  public static final String REPLICATEDMAP_NAME = "REP_MAP";
  public static final String MAP_NAME = "NORMAL_MAP";

public static void main(String[] args) {
    init();
    HazelcastInstance instance = HazelcastClient.getHazelcastClientByName(HAZELCAST_INSTANCE_NAME);
    Map<String, Object> repMap = instance.getReplicatedMap(REPLICATEDMAP_NAME);
    repMap.put("MyKey", new Cache());
    System.err.println("Retrieve " + repMap.get("MyKey"));
    Map<String, Object> normalMap = instance.getReplicatedMap(MAP_NAME);
    normalMap.put("MyKey", new Cache());
    System.err.println("Retrieve " + normalMap.get("MyKey"));
    System.exit(1);
}

private static void init() {
    ClientConfig cfg = new ClientConfig();
    cfg.setInstanceName(HAZELCAST_INSTANCE_NAME);
    cfg.addNearCacheConfig(defineNearCache(REPLICATEDMAP_NAME));
    cfg.addNearCacheConfig(defineNearCache(MAP_NAME));
    // for analysis in the hazelcast management console
    cfg.getProperties().put("hazelcast.client.statistics.enabled", "true");
    cfg.getProperties().put("hazelcast.client.statistics.period.seconds", "60");
    cfg.getNetworkConfig().addAddress("127.0.0.1:5701");
    if (HazelcastClient.newHazelcastClient(cfg) == null) {
        System.err.println(" !!! ERROR in Cache Config !!!");
    }
}
private static NearCacheConfig defineNearCache(String mapName) {
    EvictionConfig evictionConfig = new EvictionConfig()
            .setMaximumSizePolicy(EvictionConfig.MaxSizePolicy.ENTRY_COUNT)
            .setSize(200);
    return new NearCacheConfig()
            .setName(mapName)
            .setInMemoryFormat(InMemoryFormat.BINARY)
            .setInvalidateOnChange(true)
            .setEvictionConfig(evictionConfig);
}

}

我现在的问题是：使用这段代码，我得到了一个ClassNotFoundError，它试图将东西放到复制的映射或常规映射中，但在专用的Hazelcast服务器（成员）中，而不是在客户端。

    SCHWERWIEGEND: [127.0.0.1]:5701 [dev] [3.9.2] hz._hzInstance_1_dev.event-3 caught an exception while processing task:com.hazelcast.spi.impl.eventservice.impl.LocalEventDispatcher@eeed098
com.hazelcast.nio.serialization.HazelcastSerializationException: java.lang.ClassNotFoundException: de.empic.hazelwar.model.Cache
        at com.hazelcast.internal.serialization.impl.JavaDefaultSerializers$JavaSerializer.read(JavaDefaultSerializers.java:224)
        at com.hazelcast.internal.serialization.impl.StreamSerializerAdapter.read(StreamSerializerAdapter.java:48)
        at com.hazelcast.internal.serialization.impl.AbstractSerializationService.toObject(AbstractSerializationService.java:185)
        at com.hazelcast.map.impl.DataAwareEntryEvent.getValue(DataAwareEntryEvent.java:90)
        at com.hazelcast.client.impl.protocol.task.replicatedmap.AbstractReplicatedMapAddEntryListenerMessageTask.handleEvent(AbstractReplicatedMapAddEntryListenerMessageTask.java:92)
        at com.hazelcast.client.impl.protocol.task.replicatedmap.AbstractReplicatedMapAddEntryListenerMessageTask.entryAdded(AbstractReplicatedMapAddEntryListenerMessageTask.java:132)
        at com.hazelcast.replicatedmap.impl.ReplicatedMapEventPublishingService.dispatchEvent(ReplicatedMapEventPublishingService.java:82)
        at com.hazelcast.replicatedmap.impl.ReplicatedMapService.dispatchEvent(ReplicatedMapService.java:247)
        at com.hazelcast.spi.impl.eventservice.impl.LocalEventDispatcher.run(LocalEventDispatcher.java:64)
        at com.hazelcast.util.executor.StripedExecutor$Worker.process(StripedExecutor.java:225)
        at com.hazelcast.util.executor.StripedExecutor$Worker.run(StripedExecutor.java:208)
Caused by: java.lang.ClassNotFoundException: de.empic.hazelwar.model.Cache
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at com.hazelcast.nio.ClassLoaderUtil.tryLoadClass(ClassLoaderUtil.java:173)
    at com.hazelcast.nio.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:147)
    at com.hazelcast.nio.IOUtil$ClassLoaderAwareObjectInputStream.resolveClass(IOUtil.java:591)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1868)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1751)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2042)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1573)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:431)
    at com.hazelcast.internal.serialization.impl.JavaDefaultSerializers$JavaSerializer.read(JavaDefaultSerializers.java:219)
    ... 10 more

每当我从客户端配置中删除近缓存配置时，所有的工作都非常完美，当然，除了我没有近缓存。

我错过了什么？

Answer 1

@magicroomy，我在3.9.2和3.11上运行相同的。我可以确认：

• 如果将复制映射更改为映射，则无论有无近缓存，它都可以工作。
• 使用复制映射时，如果定义了近缓存，则在服务器端引发异常。
• 没有近缓存，ReplicatedMap也可以工作。

我还创建了一个github问题:https://github.com/hazelcast/hazelcast/issues/14210