Hello,

I've got the same issue with the latest version of JanusGraph and Atlas from master branch. Did you manage somehow appropriate type/serializer registration to produce GraphSON output? I'd like to visualise graph via Cytoscape or Graphexp. Thanks for any advice!

I've tried already - gremlin config (using Scylla and ES):

attributes.custom.attribute1.attribute-class=org.apache.atlas.typesystem.types.DataTypes.TypeCategory

attributes.custom.attribute1.serializer-class=org.apache.atlas.repository.graphdb.janus.serializer.TypeCategorySerializer

attributes.custom.attribute2.attribute-class=java.util.ArrayList

attributes.custom.attribute2.serializer-class=org.janusgraph.graphdb.database.serialize.attribute.SerializableSerializer

attributes.custom.attribute3.attribute-class=java.math.BigInteger

attributes.custom.attribute3.serializer-class=org.apache.atlas.repository.graphdb.janus.serializer.BigIntegerSerializer

attributes.custom.attribute4.attribute-class=java.math.BigDecimal

attributes.custom.attribute4.serializer-class=org.apache.atlas.repository.graphdb.janus.serializer.BigDecimalSerializer

then from gremlin cli:

graph.io(IoCore.graphson()).writeGraph("/atlas.json")

resulting into:

org.apache.tinkerpop.shaded.jackson.databind.JsonMappingException: Could not find a type identifier for the class : class org.apache.atlas.typesystem.types.DataTypes$TypeCategory. Make sure the value to serialize has a type identifier registered for its class.

Dne středa 15. ledna 2020 v 14:31:09 UTC+1 uživatel mar...@... napsal:

Hi,

See a similar question on:

https://gitter.im/janusgraph/janusgraph?at=5c7d868a212d0c1e1ad19eef

HTH,   Marc

Op woensdag 15 januari 2020 14:11:14 UTC+1 schreef qi...@...:

hello i am new in JanusGraph. When i use Janusgraph in Apache Atlas, i found a question, the error is :

Could not find a type identifier for the class : class org.apache.atlas.typesystem.types.DataTypes$TypeCategory. Make sure the value to serialize has a type identifier registered for its class.
org.apache.tinkerpop.shaded.jackson.databind.JsonMappingException: Could not find a type identifier for the class : class org.apache.atlas.typesystem.types.DataTypes$TypeCategory. Make sure the value to serialize has a type identifier registered for its class.
at org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider._wrapAsIOE(DefaultSerializerProvider.java:509)
at org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:482)
at org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
at org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:3893)
at org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:3164)
at org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONWriter.writeVertex(GraphSONWriter.java:82)
at org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONWriter.writeVertices(GraphSONWriter.java:110)
at org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONWriter.writeGraph(GraphSONWriter.java:71)
at org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONIo.writeGraph(GraphSONIo.java:83)
at org.apache.tinkerpop.gremlin.structure.io.Io$writeGraph.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:128)
at groovysh_evaluate.run(groovysh_evaluate:3)
at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:236)
at org.codehaus.groovy.tools.shell.Interpreter.evaluate(Interpreter.groovy:71)
at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:196)
at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.super$3$execute(GremlinGroovysh.groovy)
at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1225)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:145)
at org.apache.tinkerpop.gremlin.console.GremlinGroovysh.execute(GremlinGroovysh.groovy:72)
at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:122)
at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:95)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1225)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:145)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:165)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:130)
at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:59)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.

how can i solve it? thank you very much