Possible recursion detected (offset: 5 level(s))

[inethui]

When I tried to serialize a large object graph with many levels of references, I got the exception "Possible recursion detected (offset: 5 level(s))".

It failed to handle an object which has 6 levels of inheritance.

I debugged into Aqla code, it seems that the object's levels of references, before reaching the object which has 6 level of inheritance, has exceeded 25.

In "ProtoWriter.StartSubItem", when writer._depth is greater than RecursionCheckDepth (which is hardcoded as 25), writer.CheckRecursionStackAndPush is called. If the instance has 6 levels of inheritance, each of them is handled by a different TypeSerializer, "CheckRecursionStackAndPush" will be called 6 times on the same object instance, and this would exceed the limit 5, and would trigger the following code and throw an exception:

            if (_recursionStack.HasReferences(instance, 5))
            {
                hitLevel = _recursionStack.IndexOfReference(instance);
                throw new ProtoException("Possible recursion detected (offset: " + (_recursionStack.Count - hitLevel).ToString() + " level(s)): " + instance.ToString());
            }

I'm wondering why it checks against 5 recursions. Is this number configurable? Also, why RecursionCheckDepth is 25, and is it configurable?

Thanks

Hui Lin

[AqlaSolutions]

Hello, I don't use AqlaSerializer in my projects at the moment. Since there is no community interest, I'm not maintaining it anymore. Feel free to fork it and fix according to your needs.