Hazelcast，HazelcastSerializationException：无法序列化＆＃39; com.hazelcast.spi.impl.operationservice.impl.operations.Backup＆＃39;

Question

我创建了自定义条目处理器，用于通过扩展AbstractEntryProcessor来更新地图条目。 当我的应用程序在两个实例上的集群中运行，并且执行了条目处理器时，我收到以下异常：

com.hazelcast.nio.serialization.HazelcastSerializationException: Failed to serialize 'com.hazelcast.spi.impl.operationservice.impl.operations.Backup'
        at com.hazelcast.internal.serialization.impl.SerializationUtil.handleSerializeException(SerializationUtil.java:73)
        at com.hazelcast.internal.serialization.impl.AbstractSerializationService.toBytes(AbstractSerializationService.java:143)
        at com.hazelcast.internal.serialization.impl.AbstractSerializationService.toBytes(AbstractSerializationService.java:124)
        at com.hazelcast.spi.impl.operationservice.impl.OperationServiceImpl.send(OperationServiceImpl.java:406)
        at com.hazelcast.spi.impl.operationservice.impl.OperationBackupHandler.sendSingleBackup(OperationBackupHandler.java:187)
        at com.hazelcast.spi.impl.operationservice.impl.OperationBackupHandler.makeBackups(OperationBackupHandler.java:159)
        at com.hazelcast.spi.impl.operationservice.impl.OperationBackupHandler.backup(OperationBackupHandler.java:78)
        at com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.sendBackup(OperationRunnerImpl.java:270)
        at com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.handleResponse(OperationRunnerImpl.java:253)
        at com.hazelcast.spi.impl.operationservice.impl.OperationRunnerImpl.run(OperationRunnerImpl.java:182)
        at com.hazelcast.spi.impl.operationexecutor.impl.OperationThread.process(OperationThread.java:122)
        at com.hazelcast.spi.impl.operationexecutor.impl.OperationThread.run(OperationThread.java:102)
Caused by: com.hazelcast.nio.serialization.HazelcastSerializationException: Failed to serialize 'com.hazelcast.map.impl.operation.PartitionWideEntryWithPredicateBackupOperation'
        at com.hazelcast.internal.serialization.impl.SerializationUtil.handleSerializeException(SerializationUtil.java:73)
        at com.hazelcast.internal.serialization.impl.AbstractSerializationService.writeObject(AbstractSerializationService.java:201)
        at com.hazelcast.internal.serialization.impl.ByteArrayObjectDataOutput.writeObject(ByteArrayObjectDataOutput.java:371)
        at com.hazelcast.spi.impl.operationservice.impl.operations.Backup.writeInternal(Backup.java:222)
        at com.hazelcast.spi.Operation.writeData(Operation.java:472)
        at com.hazelcast.internal.serialization.impl.DataSerializableSerializer.write(DataSerializableSerializer.java:161)
        at com.hazelcast.internal.serialization.impl.DataSerializableSerializer.write(DataSerializableSerializer.java:52)
        at com.hazelcast.internal.serialization.impl.StreamSerializerAdapter.write(StreamSerializerAdapter.java:41)
        at com.hazelcast.internal.serialization.impl.AbstractSerializationService.toBytes(AbstractSerializationService.java:140)
        ... 10 common frames omitted
Caused by: com.hazelcast.nio.serialization.HazelcastSerializationException: Failed to serialize 'com.hazelcast.map.AbstractEntryProcessor$EntryBackupProcessorImpl'
        at com.hazelcast.internal.serialization.impl.SerializationUtil.handleSerializeException(SerializationUtil.java:73)
        at com.hazelcast.internal.serialization.impl.AbstractSerializationService.writeObject(AbstractSerializationService.java:201)
        at com.hazelcast.internal.serialization.impl.ByteArrayObjectDataOutput.writeObject(ByteArrayObjectDataOutput.java:371)
        at com.hazelcast.map.impl.operation.PartitionWideEntryBackupOperation.writeInternal(PartitionWideEntryBackupOperation.java:98)
        at com.hazelcast.map.impl.operation.PartitionWideEntryWithPredicateBackupOperation.writeInternal(PartitionWideEntryWithPredicateBackupOperation.java:51)
        at com.hazelcast.spi.Operation.writeData(Operation.java:472)
        at com.hazelcast.internal.serialization.impl.DataSerializableSerializer.write(DataSerializableSerializer.java:161)
        at com.hazelcast.internal.serialization.impl.DataSerializableSerializer.write(DataSerializableSerializer.java:52)
        at com.hazelcast.internal.serialization.impl.StreamSerializerAdapter.write(StreamSerializerAdapter.java:41)
        at com.hazelcast.internal.serialization.impl.AbstractSerializationService.writeObject(AbstractSerializationService.java:199)
        ... 17 common frames omitted
Caused by: java.util.ConcurrentModificationException: null
        at java.util.ArrayList.writeObject(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor143.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
        at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
        at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
        at java.io.ObjectOutputStream.writeObject0(Unknown Source)
        at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
        at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
        at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
        at java.io.ObjectOutputStream.writeObject0(Unknown Source)
        at java.io.ObjectOutputStream.writeObject(Unknown Source)
        at java.util.ArrayList.writeObject(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor143.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
        at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
        at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
        at java.io.ObjectOutputStream.writeObject0(Unknown Source)
        at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
        at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
        at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
        at java.io.ObjectOutputStream.writeObject0(Unknown Source)
        at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
        at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
        at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
        at java.io.ObjectOutputStream.writeObject0(Unknown Source)
        at java.io.ObjectOutputStream.writeObject(Unknown Source)
        at com.hazelcast.internal.serialization.impl.JavaDefaultSerializers$JavaSerializer.write(JavaDefaultSerializers.java:242)
        at com.hazelcast.internal.serialization.impl.StreamSerializerAdapter.write(StreamSerializerAdapter.java:41)
        at com.hazelcast.internal.serialization.impl.AbstractSerializationService.writeObject(AbstractSerializationService.java:199)
        ... 25 common frames omitted

我的入门处理器如下所示：

public class HRUpdateRacesWithEntriesProcessor extends AbstractEntryProcessor<HRMeeting.HRMeetingKey, HRMeeting> {

  private List<HRRace> races;
  private Date date;

  public HRUpdateRacesWithEntriesProcessor(List<HRRace> races, Date date) {
    this.races = races;
    this.date = date;
  }

  @Override
  public Object process(Map.Entry<HRMeeting.HRMeetingKey, HRMeeting> entry) {
    HRMeeting meeting = entry.getValue();
    races.stream()
        .filter(race -> entry.getKey().equals(new HRMeeting.HRMeetingKey(race.getMeetingDate(), race.getCourseId())))
        .forEach(newRace -> {
          Optional<HRRace> matchedRace =
              meeting.getRaces().stream().filter(origin -> origin.getKey().equals(newRace.getKey())).findFirst();
          if (newRace.getEntries() != null && matchedRace.isPresent()) {
            newRace.setUpdateDate(date);
            newRace.getEntries().stream()
                .filter(hrEntry -> matchedRace.get().getEntries().stream().map(el -> el.getKey())
                    .collect(Collectors.toList()).contains(hrEntry.getKey()))
                .forEach(hrEntry -> hrEntry.setUpdateDate(date));
            matchedRace.get().getEntries().retainAll(newRace.getEntries());
            newRace.getEntries().addAll(matchedRace.get().getEntries());
          }
          meeting.getRaces()
              .removeIf(hrRace -> matchedRace.isPresent() && matchedRace.get().getKey().equals(hrRace.getKey()));
          meeting.getRaces().add(newRace);
        });
    entry.setValue(meeting);
    return null;
  }
}

对于序列化，我的entites实现了java Serializible。是可以成为问题的原因吗？

我正在使用hazelcast-3.8-SNAPSHOT

请帮我解决。

Answer 1

这可能是一个简单的问题。当我试图在Hazelcast中将一个Object放到IMap时，我遇到了同样的错误。在我的例子中，我试图放置的对象并没有实现Serializable。

所以，我认为你应该检查一下是否实现了Serializable in＆＃34; com.hazelcast.spi.impl.operationservice.impl.operations.Backup＆＃34;像

公共类备份实现Serializable { ... }

Answer 2

我认为你的问题是以某种方式（实际上很难遵循流程流）从EntryProcessor实现中捕获内容，因此尝试使用Serializable进行序列化。无论如何DataSerializable / IdentifiedDataSerializable不是java.util.Serializable来防止意外的序列化（如你的情况）发生：）

我猜是日期：

.forEach(hrEntry -> hrEntry.setUpdateDate(date));

我希望这会有所帮助，你可能需要寻找实际捕获的值。

Answer 3

你可以发布Serializable类吗？因为我遇到错误的serialVersionUID时出现此错误。你有一个serialVersionUID并且它是一个常数（所有部署都是一样的）吗？