Chris Westmorland ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5f2c38a... ) *updated* an issue Hibernate Validator ( https://hibernate.atlassian.net/browse/HV?atlOrigin=eyJpIjoiYWMxZGUzMTI5N... ) / Bug ( https://hibernate.atlassian.net/browse/HV-1797?atlOrigin=eyJpIjoiYWMxZGUz... ) HV-1797 ( https://hibernate.atlassian.net/browse/HV-1797?atlOrigin=eyJpIjoiYWMxZGUz... ) Validation on classes with a bidirectional relationship cause stack overflow on 6.1.x ( https://hibernate.atlassian.net/browse/HV-1797?atlOrigin=eyJpIjoiYWMxZGUz... ) Change By: Chris Westmorland ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5f2c38a... ) We recently upgraded one of our microservices from Spring Boot 2.2 to 2.3 and ran into a bug with hibernate validator that seems to affect all 6.1.x versions. Here is an example that reproduces the issue. ``` {code:java} @JsonIdentityInfo( generator = ObjectIdGenerators.PropertyGenerator.class, property = "id", scope = Parent.class) public class Parent { @NotNull private Long id; @Valid private Set<Child> children = new HashSet<>(); // getters and setters } @JsonIdentityInfo( generator = ObjectIdGenerators.PropertyGenerator.class, property = "id", scope = Child.class) public class Child { @NotNull private Long id; @NotNull @Valid private Parent parent; // getters and setters } @RestController @Validated public class ValidatorController { @GetMapping("/") public Parent get() { final Parent parent = new Parent(); parent.setId(1L); final Child child = new Child(); child.setId(1L); child.setParent(parent); parent.getChildren().add(child); return parent; } @PostMapping("/") public void post(@Valid @NotNull @RequestBody Parent parent) { System.out.println(parent.getId()); } } @SpringBootTest @RunWith(SpringRunner.class) @AutoConfigureMockMvc public class ValidatorTest { @Autowired private MockMvc mvc; @Test public void test() throws Exception { final MvcResult result = mvc.perform(get("/").accept(MediaType.APPLICATION_JSON)) .andExpect(status().is2xxSuccessful()).andReturn(); final String json = result.getResponse().getContentAsString(); System.out.println(json); mvc.perform(post("/").contentType(MediaType.APPLICATION_JSON).content(json)) .andExpect(status().is2xxSuccessful()); } } {code} ``` This will trigger a stack overflow... ``` {noformat} at org.hibernate.validator.internal.engine.ValidatorImpl.access$300(ValidatorImpl.java:84) at org.hibernate.validator.internal.engine.ValidatorImpl$CascadingValueReceiver.doValidate(ValidatorImpl.java:715) at org.hibernate.validator.internal.engine.ValidatorImpl$CascadingValueReceiver.iterableValue(ValidatorImpl.java:675) at org.hibernate.validator.internal.engine.valueextraction.IterableValueExtractor.extractValues(IterableValueExtractor.java:24) at org.hibernate.validator.internal.engine.valueextraction.IterableValueExtractor.extractValues(IterableValueExtractor.java:14) at org.hibernate.validator.internal.engine.valueextraction.ValueExtractorHelper.extractValues(ValueExtractorHelper.java:42) at org.hibernate.validator.internal.engine.ValidatorImpl.validateCascadedContainerElementsForCurrentGroup(ValidatorImpl.java:651) at org.hibernate.validator.internal.engine.ValidatorImpl.validateCascadedConstraints(ValidatorImpl.java:598) at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:409) at org.hibernate.validator.internal.engine.ValidatorImpl.validateCascadedAnnotatedObjectForCurrentGroup(ValidatorImpl.java:629) at org.hibernate.validator.internal.engine.ValidatorImpl.validateCascadedConstraints(ValidatorImpl.java:590) at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:409) at org.hibernate.validator.internal.engine.ValidatorImpl.access$300(ValidatorImpl.java:84) ``` {noformat} ( https://hibernate.atlassian.net/browse/HV-1797#add-comment?atlOrigin=eyJp... ) Add Comment ( https://hibernate.atlassian.net/browse/HV-1797#add-comment?atlOrigin=eyJp... ) 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#100141- sha1:76df2fe )