Unable to load json dataset

[MartinBrugnara]

Hi all,

I am trying to load a dataset with the standard gremlin API but I got strange errors. Could you please point me in the right direction to debug this?

The dataset is the classic 'tinkerpop-modern.json', and it is encoded correctly as works correctly with other dbs.

(code cleaned up)

// Connect to neo4j
Driver driver = GraphDatabase.driver("bolt://localhost", AuthTokens.basic("neo4j", "neo4j"));
Neo4JElementIdProvider<?> vertexIdProvider = new DatabaseSequenceElementIdProvider(driver);
Neo4JElementIdProvider<?> edgeIdProvider = new DatabaseSequenceElementIdProvider(driver);
Graph g = new Neo4JGraph(driver, "db", vertexIdProvider, edgeIdProvider)) 

// Load the data
GraphSONReader.build().create().readGraph(new FileInputStream(new File(ds.path)), g);

Exception

Feb 05, 2020 5:46:32 PM org.neo4j.driver.internal.logging.JULogger info
INFO: Direct driver instance 1412925683 created for server address localhost:7687
Exception in thread "main" java.lang.IllegalArgumentException: Property value [1] is of type class java.lang.Integer is not supported
        at org.apache.tinkerpop.gremlin.structure.Property$Exceptions.dataTypeOfPropertyValueNotSupported(Property.java:163)
        at org.apache.tinkerpop.gremlin.structure.Property$Exceptions.dataTypeOfPropertyValueNotSupported(Property.java:159)
        at com.steelbridgelabs.oss.neo4j.structure.Neo4JBoltSupport.checkPropertyValue(Neo4JBoltSupport.java:39)
        at com.steelbridgelabs.oss.neo4j.structure.Neo4JVertex.property(Neo4JVertex.java:731)
        at org.apache.tinkerpop.gremlin.structure.util.Attachable$Method.lambda$createVertex$12(Attachable.java:297)
        at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
        at org.apache.tinkerpop.gremlin.structure.util.Attachable$Method.createVertex(Attachable.java:294)
        at org.apache.tinkerpop.gremlin.structure.util.Attachable$Method.lambda$create$10(Attachable.java:150)
        at org.apache.tinkerpop.gremlin.structure.util.Attachable.attach(Attachable.java:64)
        at org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONReader.lambda$readGraph$1(GraphSONReader.java:107)
        at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
        at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
        at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
        at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
        at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
        at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
        at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
        at org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONReader.readGraph(GraphSONReader.java:105)
        at com.graphbenchmark.queries.mgm.Load.query(Load.java:26)
        at com.graphbenchmark.queries.mgm.Load.query(Load.java:15)
        at com.graphbenchmark.common.GenericQuery.execute(GenericQuery.java:21)
        at com.graphbenchmark.common.GenericShell.exec_one_shot(GenericShell.java:113)
        at com.graphbenchmark.common.GenericShell.exec(GenericShell.java:99)
        at com.graphbenchmark.common.GenericShell.main(GenericShell.java:224)

Thanks, M

[rjbaucells]

It looks like the Tinkerpop readGraph() implementation is not looking at the Graph instance features (see). Neo4J does not support Integer values, only Long. The exception message Property value [1] is of type class java.lang.Integer is not supported is telling you the problem.

[MartinBrugnara]

Thank you for the quick response.