Taylor Riggan created TINKERPOP-2988:
----------------------------------------
Summary: Serialization error throws an Invalid OpProcessor
exception when using stream() API
Key: TINKERPOP-2988
URL: https://issues.apache.org/jira/browse/TINKERPOP-2988
Project: TinkerPop
Issue Type: Improvement
Affects Versions: 3.7.0
Reporter: Taylor Riggan
The following throws an `Invalid OpProcessor requested [null] (499)` exception.
The cause is due to an invalid `RequestId` (an non-conformant UUID is being
used):
```
resp = client.stream ("g.V()", {}, \{ batchSize: 1, requestId: 'foo',
userAgent: 'bar', evaluationTimeout: 5000 });
```
The error was diagnosed using Gremlin Server 3.7.0 and seeing the following in
the server logs:
```
[WARN] o.a.t.g.s.h.WsGremlinBinaryRequestDecoder - Serialization error while
decoding request
org.apache.tinkerpop.gremlin.driver.ser.SerializationException:
org.apache.tinkerpop.shaded.jackson.databind.JsonMappingException: Could not
deserialize the JSON value as required. Nested exception:
org.apache.tinkerpop.shaded.jackson.databind.exc.InvalidFormatException: Cannot
deserialize value of type `java.util.UUID` from String "foo": UUID has to be
represented by standard 36-char representation
at [Source:
(byte[])"\{"requestId":{"@type":"g:UUID","@value":"foo"},"op":"eval","processor":"","args":\{"gremlin":"g.V()","aliases":{"g":"g"},"batchSize":1,"userAgent":"bar","evaluationTimeout":5000,"bindings":{},"language":"gremlin-groovy","accept":"application/vnd.gremlin-v3.0+json"}}";
line: 1, column: 41]
at [Source:
(byte[])"\{"requestId":{"@type":"g:UUID","@value":"foo"},"op":"eval","processor":"","args":\{"gremlin":"g.V()","aliases":{"g":"g"},"batchSize":1,"userAgent":"bar","evaluationTimeout":5000,"bindings":{},"language":"gremlin-groovy","accept":"application/vnd.gremlin-v3.0+json"}}";
line: 1, column: 41] (through reference chain:
java.util.LinkedHashMap["requestId"])
at
org.apache.tinkerpop.gremlin.driver.ser.AbstractGraphSONMessageSerializerV2d0.deserializeRequest(AbstractGraphSONMessageSerializerV2d0.java:124)
at
org.apache.tinkerpop.gremlin.server.handler.WsGremlinBinaryRequestDecoder.decode(WsGremlinBinaryRequestDecoder.java:77)
....
```
A better client side error message is needed in order to provide the user with
guidance on how to fix the issue. `Invalid OpProcessor` is too ambiguous.
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