Serialization 找不到类型org.janusgraph.graphdb.relations.RelationIdentifier的序列化程序

从java客户端检索边缘时，JanusGraph v0.5.3服务器日志中显示以下错误

12277786 [gremlin-server-exec-7] WARN  org.apache.tinkerpop.gremlin.server.op.AbstractEvalOpProcessor  - The result [[e[ofncw-iyo-4avp-374][24576-hasTag->4144]]] in the request 098dc551-6558-497a-a066-b293edd29833 could not be serialized and returned.
org.apache.tinkerpop.gremlin.driver.ser.SerializationException: java.io.IOException: Serializer for type org.janusgraph.graphdb.relations.RelationIdentifier not found
    at org.apache.tinkerpop.gremlin.driver.ser.binary.ResponseMessageSerializer.writeValue(ResponseMessageSerializer.java:86)
    at org.apache.tinkerpop.gremlin.driver.ser.GraphBinaryMessageSerializerV1.serializeResponseAsBinary(GraphBinaryMessageSerializerV1.java:143)
    at org.apache.tinkerpop.gremlin.server.op.AbstractOpProcessor.makeFrame(AbstractOpProcessor.java:335)
    at org.apache.tinkerpop.gremlin.server.op.traversal.TraversalOpProcessor.handleIterator(TraversalOpProcessor.java:580)
    at org.apache.tinkerpop.gremlin.server.op.traversal.TraversalOpProcessor.lambda$iterateBytecodeTraversal$4(TraversalOpProcessor.java:411)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: Serializer for type org.janusgraph.graphdb.relations.RelationIdentifier not found
    at org.apache.tinkerpop.gremlin.structure.io.binary.TypeSerializerRegistry.validateInstance(TypeSerializerRegistry.java:392)
    at org.apache.tinkerpop.gremlin.structure.io.binary.TypeSerializerRegistry.getSerializer(TypeSerializerRegistry.java:361)
    at org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter.write(GraphBinaryWriter.java:90)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.EdgeSerializer.writeValue(EdgeSerializer.java:63)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.EdgeSerializer.writeValue(EdgeSerializer.java:34)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.writeValue(SimpleTypeSerializer.java:91)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.write(SimpleTypeSerializer.java:73)
    at org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter.write(GraphBinaryWriter.java:112)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.TraverserSerializer.writeValue(TraverserSerializer.java:49)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.TraverserSerializer.writeValue(TraverserSerializer.java:33)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.writeValue(SimpleTypeSerializer.java:91)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.write(SimpleTypeSerializer.java:73)
    at org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter.write(GraphBinaryWriter.java:112)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.CollectionSerializer.writeValue(CollectionSerializer.java:52)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.ListSerializer.writeValue(ListSerializer.java:44)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.ListSerializer.writeValue(ListSerializer.java:29)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.writeValue(SimpleTypeSerializer.java:91)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.write(SimpleTypeSerializer.java:73)
    at org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter.write(GraphBinaryWriter.java:112)
    at org.apache.tinkerpop.gremlin.driver.ser.binary.ResponseMessageSerializer.writeValue(ResponseMessageSerializer.java:84)
    ... 10 more

Map config = new HashMap();
config.put("ioRegistries", Arrays.asList("org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry"));
MessageSerializer serializer = new GraphBinaryMessageSerializerV1();
serializer.configure(config, null);

Cluster.Builder builder = Cluster.build().port(port)
        .serializer(serializer).addContactPoints(hosts)
        .loadBalancingStrategy(new LoadBalancingStrategy.RoundRobin());

Java客户端中使用的序列化程序

12277786 [gremlin-server-exec-7] WARN  org.apache.tinkerpop.gremlin.server.op.AbstractEvalOpProcessor  - The result [[e[ofncw-iyo-4avp-374][24576-hasTag->4144]]] in the request 098dc551-6558-497a-a066-b293edd29833 could not be serialized and returned.
org.apache.tinkerpop.gremlin.driver.ser.SerializationException: java.io.IOException: Serializer for type org.janusgraph.graphdb.relations.RelationIdentifier not found
    at org.apache.tinkerpop.gremlin.driver.ser.binary.ResponseMessageSerializer.writeValue(ResponseMessageSerializer.java:86)
    at org.apache.tinkerpop.gremlin.driver.ser.GraphBinaryMessageSerializerV1.serializeResponseAsBinary(GraphBinaryMessageSerializerV1.java:143)
    at org.apache.tinkerpop.gremlin.server.op.AbstractOpProcessor.makeFrame(AbstractOpProcessor.java:335)
    at org.apache.tinkerpop.gremlin.server.op.traversal.TraversalOpProcessor.handleIterator(TraversalOpProcessor.java:580)
    at org.apache.tinkerpop.gremlin.server.op.traversal.TraversalOpProcessor.lambda$iterateBytecodeTraversal$4(TraversalOpProcessor.java:411)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: Serializer for type org.janusgraph.graphdb.relations.RelationIdentifier not found
    at org.apache.tinkerpop.gremlin.structure.io.binary.TypeSerializerRegistry.validateInstance(TypeSerializerRegistry.java:392)
    at org.apache.tinkerpop.gremlin.structure.io.binary.TypeSerializerRegistry.getSerializer(TypeSerializerRegistry.java:361)
    at org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter.write(GraphBinaryWriter.java:90)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.EdgeSerializer.writeValue(EdgeSerializer.java:63)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.EdgeSerializer.writeValue(EdgeSerializer.java:34)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.writeValue(SimpleTypeSerializer.java:91)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.write(SimpleTypeSerializer.java:73)
    at org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter.write(GraphBinaryWriter.java:112)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.TraverserSerializer.writeValue(TraverserSerializer.java:49)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.TraverserSerializer.writeValue(TraverserSerializer.java:33)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.writeValue(SimpleTypeSerializer.java:91)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.write(SimpleTypeSerializer.java:73)
    at org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter.write(GraphBinaryWriter.java:112)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.CollectionSerializer.writeValue(CollectionSerializer.java:52)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.ListSerializer.writeValue(ListSerializer.java:44)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.ListSerializer.writeValue(ListSerializer.java:29)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.writeValue(SimpleTypeSerializer.java:91)
    at org.apache.tinkerpop.gremlin.structure.io.binary.types.SimpleTypeSerializer.write(SimpleTypeSerializer.java:73)
    at org.apache.tinkerpop.gremlin.structure.io.binary.GraphBinaryWriter.write(GraphBinaryWriter.java:112)
    at org.apache.tinkerpop.gremlin.driver.ser.binary.ResponseMessageSerializer.writeValue(ResponseMessageSerializer.java:84)
    ... 10 more

Map config = new HashMap();
config.put("ioRegistries", Arrays.asList("org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry"));
MessageSerializer serializer = new GraphBinaryMessageSerializerV1();
serializer.configure(config, null);

Cluster.Builder builder = Cluster.build().port(port)
        .serializer(serializer).addContactPoints(hosts)
        .loadBalancingStrategy(new LoadBalancingStrategy.RoundRobin());

服务器端序列化程序

serializers:
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphBinaryMessageSerializerV1, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphBinaryMessageSerializerV1, config: { serializeResultToString: true }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0, config: { serializeResultToString: true }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  # Older serialization versions for backwards compatibility:
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoLiteMessageSerializerV1d0, config: {ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { serializeResultToString: true }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV2d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}

---

为什么

GraphBinaryMessageSerializerV1

无法序列化

RelationIdentifier

，即使它的

ioRegistries

是用

org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry

初始化的，它在这里注册了

RelationIdentifier
我相信一些修复程序允许IorRegistry钩住GraphBinary序列化程序尚未发布，尽管我确实看到了主要JanusGraph分支上的工作。[1] 我遇到了与您报告的问题相同的问题，但能够使用
graphsonmessageserializalizarv3d0
序列化程序使事情正常工作

[1]

此设置代码适用于我：

private Cluster cluster;
private GraphTraversalSource gts;
private DriverRemoteConnection drc; 

public GraphTraversalSource createConnection()
  {
    Map config = new HashMap();
    config.put("ioRegistries", Arrays.asList("org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry"));
    MessageSerializer serializer = new GraphSONMessageSerializerV3d0();
    serializer.configure(config, null);

    Cluster.Builder builder = Cluster.build();
    builder.addContactPoint("localhost");
    builder.port(8182);
    builder.enableSsl(false);
    builder.serializer(serializer);
    this.cluster = builder.create();
    this.drc = DriverRemoteConnection.using(cluster);
    this.gts = traversal().withRemote(drc);

    return(gts);
  }

通过这种配置，我可以返回边缘。例如：

 public void runTests()
  {
    GraphTraversalSource g = createConnection();
    List<Edge> edge = g.E().limit(1).toList();
    System.out.println(edge);
    closeConnection();
  }

public void运行测试（）
{
GraphTraversalSource g=createConnection（）；
列表边=g.E（）.限制（1）.toList（）；
系统输出打印LN（边缘）；
closeConnection（）；
}

为了实现这一点，我禁用了Gremlin服务器上的Graph二进制序列化程序，只保留GraphSON序列化程序。
您找到任何线索了吗？我也对同样的问题感到困惑。@AnandVaidya什么都没有。被其他东西跟踪了。如果我发现了什么，将在这里更新…我也有这个问题@AnandVaidya和rpg。我使用另一个序列化程序使其工作，并且我相信我已经找到了二进制不工作的原因。切换到GraphSON后，我在尝试序列化graph对象时出错。序列化过程中出错：找不到类的类型标识符：class org.janusgraph.diskstorage.common.DistributedStoreManager$Deployment。确保要序列化的值为其类注册了类型标识符。（通过参考链：org.janusgraph.graphdb.database.StandardJanusGraph[“backend”]->org.janusgraph.diskstorage.backend[“storeManager”]->org.janusgraph.diskstorage.cql.CQLStoreManager[“deployment”]）

。使用GraphBinary序列化程序，该部分过去工作正常。有什么建议吗？看起来不一样。可能会问一个新问题，因为这看起来是卡桑德拉后端特有的。当然，谢谢开尔文！目前正在解决这个问题。