Hi everyone,

I am using Java and trying to write a Tinkergraph to Gryo format. To do so I tried:

g.io("file.kryo").write().iterate()

As suggested in the tinkerpop documentation.

However, this results in the following Exception:

Exception in thread "main" java.lang.IllegalArgumentException: Class is not registered: org.janusgraph.graphdb.relations.RelationIdentifier
Note: To register this class use: kryo.register(org.janusgraph.graphdb.relations.RelationIdentifier.class);

I could not find anything on how to perform this registration.

It works fine with graphml format.

Would be great if someone could help me out,

Thank you!

Lilly

Could some

Seems you mean Janusgraph instead Tinkergraph

This snippet works as expected:

graph = JanusGraphFactory.build().

set("storage.backend","inmemory").
open()
g = graph.traversal()
g.addV().as("v1").addV().as("v2").addE("E").from("v1").to("v2")
g.tx().commit()
g.io("file.kryo").write()
g.io("file.kryo").read()
g.V()

четверг, 3 сентября 2020 г. в 11:20:12 UTC+3, Lilly:

Hi everyone,

I am using Java and trying to write a Tinkergraph to Gryo format. To do so I tried:

g.io("file.kryo").write().iterate()

As suggested in the tinkerpop documentation.

However, this results in the following Exception:

Exception in thread "main" java.lang.IllegalArgumentException: Class is not registered: org.janusgraph.graphdb.relations.RelationIdentifier
Note: To register this class use: kryo.register(org.janusgraph.graphdb.relations.RelationIdentifier.class);

I could not find anything on how to perform this registration.

It works fine with graphml format.

Would be great if someone could help me out,

Thank you!

Lilly

Could some

Hi Lilly,

Have yuo tried to register JanusGraphIoRegistry ?

g.io(out)

.with(IO.writer, IO.gryo)

.with(IO.registry, JanusGraphIoRegistry.class.getName())

.write()

Regards,

Nicolas

Le jeudi 3 septembre 2020 à 16:13:35 UTC+2, Lilly a écrit :

Thank you for your answer.

The problem is, I was actually meaning a Tinkergraph which is constructed by "subgraphing" a janusgraph.

I also tried it in the console like so:

gremlin> subG = g.E().has("record_count",gt(4000)).subgraph("sub").cap("sub").next()
==>tinkergraph[vertices:122 edges:106]
gremlin> subG.traversal().io("test.kryo").write().iterate()
Class is not registered: org.janusgraph.graphdb.relations.RelationIdentifier
Note: To register this class use: kryo.register(org.janusgraph.graphdb.relations.RelationIdentifier.class);
Type ':help' or ':h' for help.
Display stack trace? [yN]
gremlin> kryo.register(org.janusgraph.graphdb.relations.RelationIdentifier.class)
No such property: kryo for class: groovysh_evaluate
Type ':help' or ':h' for help.
Display stack trace? [yN]
gremlin> subG.configuration().setProperty("storage.backend","inmemory")
==>null
gremlin> subG.configuration().getString("storage.backend")
==>inmemory
gremlin> t = subG.traversal()
==>graphtraversalsource[tinkergraph[vertices:122 edges:106], standard]
gremlin> t.io("file.kryo").write()
Class is not registered: org.janusgraph.graphdb.relations.RelationIdentifier
Note: To register this class use: kryo.register(org.janusgraph.graphdb.relations.RelationIdentifier.class);

I cannot set the backand option on the Janusgraph associated with g, since this does not fit into memory.

Anything else i can do?

Thank you!

ow...@... schrieb am Donnerstag, 3. September 2020 um 11:48:36 UTC+2:

Seems you mean Janusgraph instead Tinkergraph

This snippet works as expected:

graph = JanusGraphFactory.build().

set("storage.backend","inmemory").
open()
g = graph.traversal()
g.addV().as("v1").addV().as("v2").addE("E").from("v1").to("v2")
g.tx().commit()
g.io("file.kryo").write()
g.io("file.kryo").read()
g.V()

четверг, 3 сентября 2020 г. в 11:20:12 UTC+3, Lilly:

Hi everyone,

I am using Java and trying to write a Tinkergraph to Gryo format. To do so I tried:

g.io("file.kryo").write().iterate()

As suggested in the tinkerpop documentation.

However, this results in the following Exception:

Exception in thread "main" java.lang.IllegalArgumentException: Class is not registered: org.janusgraph.graphdb.relations.RelationIdentifier
Note: To register this class use: kryo.register(org.janusgraph.graphdb.relations.RelationIdentifier.class);

I could not find anything on how to perform this registration.

It works fine with graphml format.

Would be great if someone could help me out,

Thank you!

Lilly

Could some

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