Genson - Error on Serialization

[Usc La]

I am getting the following error when I serialize from Map (HashMap) to String.

Failed to serialize object of type class java.util.HashMap.

    Map<String, Obj> res = getResults();

    Genson genson = new Genson();

    String maptoJSON = genson.serialize(res);

It works fine locally on my system (MAC) but does not work on the Stage box (Unix).

Obj is a class which has a few fields in it.

Ap

[Eugen Cepoi]

Can you please provide the content of the map, the full stacktrace and the version of Genson you use?

There should be no problem with serializing a map, I think it is related to the content inside the map.

Thanks,

Eugen

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[Usc La]

public class Obj {

ArrayList< ObjB > returns;

ArrayList< ObjB > trailingReturns;

}

public class ObjB implements Serializable {

Long returnDate;

Double netReturn;

Double aum;

[Usc La]

Genson 1.2

[Eugen Cepoi]

From the information you provided nothing looks wrong and should work.
I can not help without more infos. What are the differences between your local environment and the one you deploy (linux/mac/windows should not matter as Java provides the abstraction), seeing the full stacktrace would help even more.

The best being to provide a code that I can run to reproduce the problem.

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[Usc La]

So looks like, there is a SIZE issue.

If I cross a certain size, the map gives serialization error.

Any solution for this ?

Ap

[Amay Patil]

Found the Solution. Increasing the Heap Size fixed the problem.

Ap

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[Eugen Cepoi]

Increasing the heap size delays the problem but doesn't really fix it.

If you serialize to a string then for sure you might have memory issues for large objects as you would have the object in memory + its serialized form at the same time. You have alternate methods genson.serialize(object, Writer/OutputStream) that you could use.

About the exception "Failed to serialize object of type class java.util.HashMap." it is the top level one, but you should see in your logs/output a sequence of exceptions that are more detailed. The last one should have the valuable information.

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