Von: janusgraph-users@... <janusgraph-users@...> Im Auftrag von tormodhau@...
Gesendet: Montag, 9. Januar 2023 10:25
An: janusgraph-users@...
Betreff: [janusgraph-users] Error when trying to read ElementMap from Edge in Gremlin.Net: The given key 'janusgraph.RelationIdentifier' was not present in the dictionary #gremlin-dotnet

        var edgeValues = g.E()

            .Has("Mrid", "..guid..")

            .ElementMap<object>()

            .Next();            // <---- Throws here

    public void AddingEdgeBetweenTwoVertexes()

    {

        // Start a Janusgraph + Cassandra + ElasticSearch environment with docker compose:

        // https://github.com/JanusGraph/janusgraph-docker/blob/master/docker-compose-cql-es.yml

        var gremlinServer = new GremlinServer("localhost", 8182);

        var gremlinClient = new GremlinClient(gremlinServer);

        var remoteConnection = new DriverRemoteConnection(gremlinClient, "g");

        var g = AnonymousTraversalSource.Traversal().WithRemote(remoteConnection);

        g.V().Drop().Iterate();

        g.E().Drop().Iterate();

        var firstMrid = Guid.NewGuid();

        g.AddV("V1")

            .Property("Mrid", firstMrid)

            .Iterate();

        var secondMrid = Guid.NewGuid();

        g.AddV("V2")

            .Property("Mrid", secondMrid)

            .Iterate();

        var edgeMrid = Guid.NewGuid();

        g.AddE("E1")

            .Property("Mrid", edgeMrid)

            .Property("Name", "Hello Edge")

            .From(__.V().Has("Mrid", firstMrid))

            .To(__.V().Has("Mrid", secondMrid))

            .Iterate();

        // Verify that two vertices and one edge is added

        Assert.Equal(1, g.E().Count().Next());

        Assert.Equal(2, g.V().Count().Next());

        var edgeValues = g.E()

            .Has("Mrid", edgeMrid)

            .ElementMap<object>()

            .Next();            // <---- Throws here

        Assert.Equal("Hello Edge", edgeValues["Name"]);

    }

  Failed tests.Graph.GremlinExplorationTest.AddingEdgeBetweenTwoVertexes_ [465 ms]

  Error Message:

   System.Collections.Generic.KeyNotFoundException : The given key 'janusgraph.RelationIdentifier' was not present in the dictionary.

  Stack Trace:

     at System.Collections.Generic.Dictionary`2.get_Item(TKey key)

   at Gremlin.Net.Structure.IO.GraphBinary.TypeSerializerRegistry.GetSerializerForCustomType(String typeName)

   at Gremlin.Net.Structure.IO.GraphBinary.GraphBinaryReader.ReadAsync(Stream stream)

   at Gremlin.Net.Structure.IO.GraphBinary.Types.MapSerializer`2.ReadValueAsync(Stream stream, GraphBinaryReader reader)

   at Gremlin.Net.Structure.IO.GraphBinary.Types.SimpleTypeSerializer`1.ReadValueAsync(Stream stream, GraphBinaryReader reader, Boolean nullable)

   at Gremlin.Net.Structure.IO.GraphBinary.Types.SimpleTypeSerializer`1.ReadAsync(Stream stream, GraphBinaryReader reader)

   at Gremlin.Net.Structure.IO.GraphBinary.GraphBinaryReader.ReadAsync(Stream stream)

   at Gremlin.Net.Structure.IO.GraphBinary.Types.TraverserSerializer.ReadValueAsync(Stream stream, GraphBinaryReader reader)

   at Gremlin.Net.Structure.IO.GraphBinary.Types.SimpleTypeSerializer`1.ReadValueAsync(Stream stream, GraphBinaryReader reader, Boolean nullable)

   at Gremlin.Net.Structure.IO.GraphBinary.Types.SimpleTypeSerializer`1.ReadAsync(Stream stream, GraphBinaryReader reader)

   at Gremlin.Net.Structure.IO.GraphBinary.GraphBinaryReader.ReadAsync(Stream stream)

   at Gremlin.Net.Structure.IO.GraphBinary.Types.ListSerializer`1.ReadValueAsync(Stream stream, GraphBinaryReader reader)

   at Gremlin.Net.Structure.IO.GraphBinary.Types.SimpleTypeSerializer`1.ReadValueAsync(Stream stream, GraphBinaryReader reader, Boolean nullable)

   at Gremlin.Net.Structure.IO.GraphBinary.Types.SimpleTypeSerializer`1.ReadAsync(Stream stream, GraphBinaryReader reader)

   at Gremlin.Net.Structure.IO.GraphBinary.GraphBinaryReader.ReadAsync(Stream stream)

   at Gremlin.Net.Structure.IO.GraphBinary.ResponseMessageSerializer.ReadValueAsync(MemoryStream stream, GraphBinaryReader reader)

   at Gremlin.Net.Structure.IO.GraphBinary.GraphBinaryMessageSerializer.DeserializeMessageAsync(Byte[] message)

   at Gremlin.Net.Driver.Connection.HandleReceivedAsync(Byte[] received)

   at Gremlin.Net.Driver.Connection.ReceiveMessagesAsync()

   at Gremlin.Net.Driver.ProxyConnection.SubmitAsync[T](RequestMessage requestMessage)

   at Gremlin.Net.Driver.GremlinClient.SubmitAsync[T](RequestMessage requestMessage)

   at Gremlin.Net.Driver.Remote.DriverRemoteConnection.SubmitBytecodeAsync(Guid requestid, Bytecode bytecode)

   at Gremlin.Net.Driver.Remote.DriverRemoteConnection.SubmitAsync[S,E](Bytecode bytecode)

   at Gremlin.Net.Process.Remote.RemoteStrategy.ApplyAsync[S,E](ITraversal`2 traversal)

   at Gremlin.Net.Process.Utils.WaitUnwrap(Task task)

   at Gremlin.Net.Process.Remote.RemoteStrategy.Apply[S,E](ITraversal`2 traversal)

   at Gremlin.Net.Process.Traversal.DefaultTraversal`2.ApplyStrategies()

   at Gremlin.Net.Process.Traversal.DefaultTraversal`2.GetTraverserEnumerator()

   at Gremlin.Net.Process.Traversal.DefaultTraversal`2.get_TraverserEnumerator()

   at Gremlin.Net.Process.Traversal.DefaultTraversal`2.MoveNextInternal()

   at Gremlin.Net.Process.Traversal.DefaultTraversal`2.MoveNext()

   at Gremlin.Net.Process.Traversal.DefaultTraversal`2.Next()

   at tests.Graph.GremlinExplorationTest.AddingEdgeBetweenTwoVertexes_() in /Users/tormodhaugene/customers/volue/spark-grid/tests/Graph/GremlinExplorationTest.cs:line 130

   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)

   at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)