StackOverflowError on mongoTemplate.find when entity have a generic type

[felipeissa]

I'm currently upgrading to spring-boot 2.7.9 and I'm getting the following error when I do a find:

java.lang.StackOverflowError
	at org.springframework.data.util.TypeDiscoverer.createInfo(TypeDiscoverer.java:106)
	at org.springframework.data.util.ParentTypeAwareTypeInformation.createInfo(ParentTypeAwareTypeInformation.java:71)
	at org.springframework.data.util.TypeVariableTypeInformation.lambda$new$0(TypeVariableTypeInformation.java:55)
	at org.springframework.data.util.Lazy.getNullable(Lazy.java:231)
	at org.springframework.data.util.Lazy.get(Lazy.java:115)
	at org.springframework.data.util.TypeVariableTypeInformation.getTypeArguments(TypeVariableTypeInformation.java:65)
	at org.springframework.data.util.TypeVariableTypeInformation.lambda$new$0(TypeVariableTypeInformation.java:55)
	at org.springframework.data.util.Lazy.getNullable(Lazy.java:231)
	at org.springframework.data.util.Lazy.get(Lazy.java:115)
	at org.springframework.data.util.TypeVariableTypeInformation.getTypeArguments(TypeVariableTypeInformation.java:65)
	at org.springframework.data.util.TypeVariableTypeInformation.lambda$new$0(TypeVariableTypeInformation.java:55)
	at org.springframework.data.util.Lazy.getNullable(Lazy.java:231)
	at org.springframework.data.util.Lazy.get(Lazy.java:115)
	at org.springframework.data.util.TypeVariableTypeInformation.getTypeArguments(TypeVariableTypeInformation.java:65)
	at org.springframework.data.util.TypeVariableTypeInformation.lambda$new$0(TypeVariableTypeInformation.java:55)
	at org.springframework.data.util.Lazy.getNullable(Lazy.java:231)
	at org.springframework.data.util.Lazy.get(Lazy.java:115)

This happens only when the entity I'm trying to read have a generic field on it, which I'm not passing to the 'find' method on mongoTemplate.

A working example of this problem can be seen on this repo: https://github.com/felipeissa/mongo-generic-overflow. Only configure the database and run it and the problem will appear.

Spring version: 2.7.9
Jdk Version: 11.0.17
Os: Windows 11

[christophstrobl]

Thanks for reporting and the reproducer!

[mp911de]

Moved this ticket into Spring Data Commons as TypeVariableTypeInformation lives here.

[christophstrobl]

The issue seems to be limited to the 2.x line of data-commons and does not exist on 3.0.x. Need to dig in a bit to see what's going on.

[christophstrobl]

So change 37b072f seems to have brought in the code snippet causing trouble now.
It's reproducible via:

TypeInformation td = ClassTypeInformation.from(WrapperForSomeGeneric.class);
TypeInformation<?> field = td.getProperty("field");
field.getProperty("value").getTypeArguments();

class WrapperForSomeGeneric<T> {
	private SomeGeneric<T> field;
}

class SomeGeneric<T> {
	T value;
}

getTypeArguments() is invoked during the mapping process when we call TypeInformation.specialize during read operations where we detect a more concrete type is specified in the source data.

@odrotbohm any thoughts from your side?