And, the following are serializers registered in my gremlin-server.yaml for JanusGraph 0.2.1 (I use the default packeged set of serializers):

serializers:
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoLiteMessageSerializerV1d0, config: {ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { serializeResultToString: true }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV2d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}

On Friday, 24 August 2018 22:10:52 UTC+5:30, Debasish Kanhar wrote:

Hi All,

So as you all know I've been developing Client drivers for JanusGraph. I was able to test my initial version of library against JanusGraph 0.3.0 which uses TP 3.3.3. I now want to test the same set of driver for JanusGraph 0.2.1 which used TP 3.2.9 but I feel I've hit a bump with respect to Serialization for Predicate class.

So, my existent features like Adding of GeoShapes, Querying GeoShape and RelationIdentifier serialization/deserialization works. But any of my features leveraging TinkerPop's Predicate (PSerializer) doesn't work. I feel like this is some sort of serialization issue.

So, when I've implemented TextContainsFuzzy, which was working against JG 0.3.0/TP 3.3.3 (Using GraphSON 3.0) but the same doesn't work on GraphSON 2.0.

The following is my serialized object being sent to Gremlin-Server (Gremlin-server logs specify this)

Using TextFuzzy:

Error message:

org.apache.tinkerpop.gremlin.driver.ser.AbstractGraphSONMessageSerializerV2d0  - Request [PooledUnsafeDirectByteBuf(ridx: 303, widx: 303, cap: 337)] could not be deserialized by org.apache.tinkerpop.gremlin.driver.ser.AbstractGraphSONMessageSerializerV2d0.
org.apache.tinkerpop.shaded.jackson.databind.JsonMappingException: Could not deserialize the JSON value as required. Nested exception: org.apache.tinkerpop.shaded.jackson.databind.JsonMappingException: Could not deserialize the JSON value as required. Nested exception: java.lang.IllegalStateException: org.apache.tinkerpop.gremlin.process.traversal.P.textContainsFuzzy([Ljava.lang.Object;)

And the serialized object being sent:

{
  "requestId": {
    "@type": "g:UUID",
    "@value": "7328b342-2ed3-43a5-b589-f6688b264ee7"
  },
  "processor": "traversal",
  "op": "bytecode",
  "args": {
    "gremlin": {
      "@type": "g:Bytecode",
      "@value": {
        "step": [
          [
            "V"
          ],
          [
            "has",
            "name",
            {
              "@type": "g:P",
              "@value": {
                "predicate": "textContainsFuzzy",
                "value": "herculeas"
              }
            }
          ]
        ]
      }
    },
    "aliases": {
      "g": "gg"
    }
  }
}

The serialized object really looks good, like the way it is expected. Doesn't it? Or else I cant seem to dechiper what's wrong.

I'm also facing similar errors which using the same PSerializer class for extending Geo Predicates like geoWithin, but I guess both are tied to same problem, and if one gets solved, other will also :-)

If needed, I can attach the serialized object for geoWithin too. But any help in debugging this will be really helpful, as this is last piece of development I'm expecting before releasing version 1 of drivers with support for both GraphSON 2.0 and GraphSON 3.0

Thanks.