NotFoundAction.EXCEPTION not throwing an exception

Telmo Marques :

I have the following relationship:

@Entity
public class SomeEntity {
    //...

    @EmbeddedId
    private SomeEntityIdentity id;

    @OneToOne
    @NotFound(action = NotFoundAction.EXCEPTION) //This is the important bit
    @JoinColumns({
        //...
    })
    private OtherEntity example;

    //...
}

Then, I use Spring data's findOne() to grab my entity by the Id:

SomeEntityIdentity id = new SomeEntityIdentity();
id.setAttribute1(1);
id.setAttribute2(new BigDecimal(123));
return this.someEntityRepository.findOne(id);

The problem is that no exception is thrown if OtherEntity is not found, as findOne() simply returns null. Even if I set @OneToOne(optional = false) I still get a null from findOne(), when I was excepting only OtherEntity to be null.

I believe an exception should be thrown. Does anyone any have ideas?

Thank you!

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Edit: Identity and Repository classes below.

@Embeddable
public class SomeEntityIdentity implements Serializable {
    private int attribute1;
    private BigDecimal attribute2;

    public void setAttribute1(int attribute1) {
        this.attribute1 = attribute1;
    }

    public void setAttribute2(BigDecimal attribute2) {
        this.attribute2 = attribute2;
    }
}

---

public interface SomeEntityRepository extends JpaRepository<SomeEntity, SomeEntityIdentity> {
}

Telmo Marques :

Turned out to be an incompatibility between Hibernate and Spring Data versions.

This project was using Hibernate 4.3.1.Final to take advantage of JPA 2.1 features; but with spring-data-jpa 1.6.6.RELEASE, that doesn't support that Hibernate version.

Because everything was working correctly (up until this issue) I didn't notice this at first. When I tried upgrading spring-data-jpa to an Hibernate 4.3 compatible version I couldn't, because spring-data-jpa jumps from Hibernate 3 to Hibernate 5 on 2.0.x versions. This also seems to require Java 8, so that was a no go for me.

Ended up downgrading to Hibernate 3.6.10.Final and everything started working OK.

TL;DR: Always check version compatibility between Spring and other libraries, even if there's no obvious errors.

I just wanted to finish by saying that Spring version management is a total pain.

---

Working dependency configuration:

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>3.6.10.Final</version>
</dependency>

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>3.6.10.Final</version>
</dependency>

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-jpa</artifactId>
    <version>1.6.6.RELEASE</version>
</dependency>