CODEWITHSUNDEEP
gremlintinkerpoptinkerpop3gremlin-server
fermmm
fermmm

Reputation: 1216

Cannot load the GraphML file I just saved

I'm using Gremlin Server.

I save the contents of the database in an XML file (GraphML) with this line:

g.io(path).write().iterate()

To load the file I use this line:

g.io(path).read().iterate();

And then I get this error:

connection.js:282
        new ResponseError(util.format('Server error: %s (%d)', response.status.message, response.status.code), response.status));
        ^
ResponseError: Server error: For input string: "-2555865115" (500)

This error is coming from gremlin server.

If I search for this value in the XML file (-2555865115) and I remove the last character (-255586511) then the problem is solved.

Why this happens? How can I fix this issue? The database is always saving a file that I have to fix manually.

If I have to change something in the configuration files of Gremlin Server, can you please tell me which file to modify and how? because I never did that before.

I'm using Gremlin server in my local computer just for testing, without any changes.

EDIT:

I changed conf/tinkergraph-empty.properties to this:

gremlin.tinkergraph.vertexIdManager=ANY
gremlin.tinkergraph.edgeIdManager=ANY
gremlin.tinkergraph.vertexPropertyIdManager=ANY

I restarted, but I get the same error when loading the XML file.

Upvotes: 0

Views: 254

Answers (1)

Bill Horvath
Bill Horvath

Reputation: 1717

Given that removing the last integer from your numerical value solved the problem, I'd speculate you're hitting a limit; specifically, the lowest value an integer can have.

In Java, that value is -2147483647, and that happens to be the language that the default implementation of Gremlin Server is written in. As such, it's likely that the deserialization process is failing while trying to interpret that value as an integer. Since the value is below the minimum value of an integer, and since the error message talks about it being an input string, Integer.parseInt("-2555865115") is probably the call that's failing behind the scenes.

If Gremlin is both serializing and de-serializing the data, it might be a bug in that implementation, and you might want to file an issue. In the mean time, consider implementing and registering a custom serializer to give yourself more control over how the IO process works.

Upvotes: 1

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