members of Interface TypeInformation are null when AOP and Data Rest are enabled and a bean is marked @Lazy about spring-boot HOT 1 CLOSED

Thanks for the report.

I've managed to reduce things down quite a bit more and can reproduce the failure with the following:

package com.example.lazyproxyissue;

import static org.assertj.core.api.Assertions.assertThat;

import org.junit.jupiter.api.Test;
import org.springframework.data.util.ClassTypeInformation;
import org.springframework.data.util.TypeInformation;

public class SimplifiedTests {

	@Test
	void typeInformationMapIsNotNull() {
		Object whatever = ClassTypeInformation.MAP;
		assertThat(TypeInformation.MAP).isNotNull();
	}

}

The test fails as TypeInformation.MAP is null. The test passes when Object whatever = ClassTypeInformation.MAP; is commented out. I think this is a bug in Spring Data Commons. As far as I can tell, to work as intended certain classes and interfaces have to be initialized in a particular order. If that order isn't used, constants on TypeInformation become null.

Please open a Spring Data Commons issue so that the Spring Data team can investigate.

from spring-boot.