Panagiwths Mpougioukos ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=63ddac9... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZGE1YmM3ZmYw... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16135?atlOrigin=eyJpIjoiZGE1Ym... ) HHH-16135 ( https://hibernate.atlassian.net/browse/HHH-16135?atlOrigin=eyJpIjoiZGE1Ym... ) When owning side of @OneToOne is declared with fetchType.EAGER and not owning side of @OneToOne is declared with fetchType.Lazy the ORM fails to load the mapped entity ( https://hibernate.atlassian.net/browse/HHH-16135?atlOrigin=eyJpIjoiZGE1Ym... ) Change By: Panagiwths Mpougioukos ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=63ddac9... ) [https://github.com/de313e/SpringEagerLoadingIssue|https://github.com/de31...] The above contains the test case to verify the bug Possible workaround of issue [https://github.com/de313e/SpringEagerLoadingIssue/pull/2|https://github.c...] Happens only when the *not owning side* has more than 1 fields mapped with {{@OneToOne}} which are declared as {{LAZY}} but from the owner side they are declared as {{EAGER}}. In this example the not owning entity of {{User}} has 2 fields mapped with {{@OneToOne}}, namely {{UserSettings}} and {{UserTermsOfUse}} which are declared as {{LAZY}}. The owning sides of relationship which are {{UserSettings}} and {{UserTermsOfUse}} have a {{EAGER}} relationship with the {{User}} entity. ( https://hibernate.atlassian.net/browse/HHH-16135#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16135#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100214- sha1:6115380 )