JanusGraph•9mo ago

ServerGremlinExecutor.<init> - Could not invoke constructor on class org.janusgraph.graphdb.manageme

Hi, I am still learning to use JanusGraph. I was working on doing bulk ingestion of data into JanusGraph and I am struggling with overcoming this error which involves using ConfiguredGraphFactory for dynamic graph creation.
I configured 3 nodes to be the CassandraDB backend cluster, which are all up and running. Here's the complete janusgraph-cql-configuration.properties file:

gremlin.graph=org.janusgraph.core.ConfiguredGraphFactory
storage.backend=cql
graph.graphname=ConfigurationManagementGraph
storage.hostname=192.168.0.1,192.168.1.100,192.169.10.20
storage.cql.local-datacenter=168
cache.db-cache = true
cache.db-cache-clean-wait = 20
cache.db-cache-time = 180000
cache.db-cache-size = 0.5

gremlin.graph=org.janusgraph.core.ConfiguredGraphFactory
storage.backend=cql
graph.graphname=ConfigurationManagementGraph
storage.hostname=192.168.0.1,192.168.1.100,192.169.10.20
storage.cql.local-datacenter=168
cache.db-cache = true
cache.db-cache-clean-wait = 20
cache.db-cache-time = 180000
cache.db-cache-size = 0.5

Here' a snippet of the key parts in gremlin-server.yaml file:

host: 0.0.0.0
port: 8182
evaluationTimeout: 30000
channelizer: org.apache.tinkerpop.gremlin.server.channel.WebSocketChannelizer
graphManager: org.janusgraph.graphdb.management.JanusGraphManager
graphs: {
  ConfigurationManagementGraph: conf/janusgraph-cql-configurationgraph.properties
}
scriptEngines: {
  gremlin-groovy: {
    plugins: { org.janusgraph.graphdb.tinkerpop.plugin.JanusGraphGremlinPlugin: {},
               org.apache.tinkerpop.gremlin.server.jsr223.GremlinServerGremlinPlugin: {},
               org.apache.tinkerpop.gremlin.tinkergraph.jsr223.TinkerGraphGremlinPlugin: {},
               org.apache.tinkerpop.gremlin.jsr223.ImportGremlinPlugin: {classImports: [java.lang.Math], methodImports: [java.lang.Math#*]},
               org.apache.tinkerpop.gremlin.jsr223.ScriptFileGremlinPlugin: {files: []}}}}

host: 0.0.0.0
port: 8182
evaluationTimeout: 30000
channelizer: org.apache.tinkerpop.gremlin.server.channel.WebSocketChannelizer
graphManager: org.janusgraph.graphdb.management.JanusGraphManager
graphs: {
  ConfigurationManagementGraph: conf/janusgraph-cql-configurationgraph.properties
}
scriptEngines: {
  gremlin-groovy: {
    plugins: { org.janusgraph.graphdb.tinkerpop.plugin.JanusGraphGremlinPlugin: {},
               org.apache.tinkerpop.gremlin.server.jsr223.GremlinServerGremlinPlugin: {},
               org.apache.tinkerpop.gremlin.tinkergraph.jsr223.TinkerGraphGremlinPlugin: {},
               org.apache.tinkerpop.gremlin.jsr223.ImportGremlinPlugin: {classImports: [java.lang.Math], methodImports: [java.lang.Math#*]},
               org.apache.tinkerpop.gremlin.jsr223.ScriptFileGremlinPlugin: {files: []}}}}

If I do away from using the ConfiguredGraphFactory, as shown below in the code snippet, the server runs.

graphManager: org.janusgraph.graphdb.management.JanusGraphManager
graphs: {
        graph: conf/janusgraph-cql.properties
}

graphManager: org.janusgraph.graphdb.management.JanusGraphManager
graphs: {
        graph: conf/janusgraph-cql.properties
}

I deeply appreciate any guidance! Reference tutorial: https://nitinpoddar.medium.com/bulk-loading-data-into-janusgraph-ace7d146af05

Medium

Bulk Loading data into JanusGraph

Early this year, I was tasked to do a POC work to check the feasibility of switching our Identity Resolution solution from Apache Hive…

1 Reply

Florian Hockmann•9mo ago

Can you please post the full stack trace of the error you are getting?

Gaming

Programming

ServerGremlinExecutor.<init> - Could not invoke constructor on class org.janusgraph.graphdb.manageme