8 preview not working?

Describe the bug

Exception thrown: 'System.InvalidOperationException' in System.Private.CoreLib.dll: ''Execute' must not be called on GremlinQueryExecutor.Invalid. If you are getting this exception while executing a query, set a proper GremlinQueryExecutor on the GremlinQuerySource (e.g. with 'g.UseGremlinServer(...)' for GremlinServer which can be found in the 'ExRam.Gremlinq.Providers.UseGremlinServer' package).'

Cannot connect to any gremlin-server. I’ve tried running Janus & OrientDb. I can connect just fine using my console / groovy.

Version information 8.0.0-preview-0586

Minimal working example

        private static IGremlinQuerySource CreateRelationsQuerySource(
            GremlinConfiguration gdbConfiguration, 
            string dbEnvironment,
            Microsoft.Extensions.Logging.ILogger logger)
        {
            return g.ConfigureEnvironment(env => 
                {
                    var model = GraphModel.FromTypes(
                        vertexTypes: new[]
                            {
                                typeof(SiteAccount)
                            },
                        edgeTypes: new[]
                            {
                                typeof(ClientSiteRelation)
                            });

                    var gdb = env.UseLogger(logger)
                        .UseModel(model);
                    if (dbEnvironment.Equals(EnvironmentVariable.DB.COSMOS))
                    {
                        gdb.UseCosmosDb(builder => builder
                                .ConfigureWebSocket(socket => socket
                                    .ConfigureQueryLoggingOptions(o => o
                                        .SetQueryLoggingVerbosity(QueryLoggingVerbosity.None))
                                )
                                .At(gdbConfiguration.WssEndpoint, DataStore.Gremlin.Database, DataStore.Gremlin.ClientSiteRelationsGraph)
                                .AuthenticateBy(gdbConfiguration.AuthKey)
                            );
                    }
                    else
                    {
                        gdb.UseJanusGraph(builder => builder
                                .AtLocalhost()
                                .ConfigureQueryLoggingOptions(o => o
                                .SetQueryLoggingVerbosity(QueryLoggingVerbosity.None))
                            );
                    }

                    return gdb;
                });
        }

Additional context Running the gremlin-servers in docker, but port 8182 is open and everything is operating properly.

[danielcweber]

Things in Gremlinq are immutable. Have a look at the samples project at https://github.com/ExRam/ExRam.Gremlinq.Samples. You call UseJanusGraph but throw away the result! It’s meant to be fluent. Observe the return value and update your variable accordingly, it’ll work.

[dgioulakis]

Makes sense … I should have been doing gdp = gdp.Use..... Thank you!