7

Getting this error when jpa tries to fetch the object from database.

Error : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.StackOverflowError] with root cause

UserController In this the getUsers method doesn't work and caused error

 @RestController @RequestMapping("user") public class UserController { private final Logger log = LoggerFactory.getLogger(UserController.class); @Autowired private UserService userService; @Autowired private RoleService roleService; @PostMapping("/add") public MessageDto addUser(@RequestBody UserDto userDto) { log.info("Post call have been received at user/add with DTO " + userDto); //Set<UserRoleDomain> UserDomain userDomain = userService.mapUserDtoToDomain(userDto); return userService.add(userDomain, roleService.add(userDomain)); } @GetMapping("/get/{userName}") public UserDto getUsers(@PathVariable("userName") String userName) { log.info("Get call have been received at user/get/ "+userName); return userService.getById(userName); } }

UserService

 @Service @Transactional public class UserService { private final Logger log = LoggerFactory.getLogger(UserService.class); @Autowired private ObjectMapper objectMapper; @Autowired private UserRepository userRepository; @Autowired private RoleRepository roleRepository; @Autowired private UserRoleRepository userRoleRepository; public MessageDto add(UserDomain userDomain , Set<UserRoleDomain> userRoles) { // UserDomain userDomain = mapUserDtoToDomain(userDto); if( userRepository.findByUserName(userDomain.getUserName())!=null) // causing error { String responseMessage = "User is already register with name ! "+userDomain.getUserName(); MessageDto messageDto = new MessageDto(responseMessage); log.info(responseMessage); return messageDto; } else { for (UserRoleDomain userRoleDomain: userRoles) { System.out.println("result : "+userRoleDomain.getRoleDomain()); roleRepository.save(userRoleDomain.getRoleDomain()); } userDomain.getUserRoleDomains().addAll(userRoles); userRepository.save(userDomain); String responseMessage = "User has been added with Id " + userDomain.getUserId(); MessageDto messageDto = new MessageDto(responseMessage); log.info(responseMessage); return messageDto; } } public UserDto getById(String userName) { UserDomain userDomain = userRepository.findByUserName(userName); return mapUserDomainToDto(userDomain); } public UserDomain mapUserDtoToDomain(UserDto userDto) { return objectMapper.convertValue(userDto , UserDomain.class); } public UserDto mapUserDomainToDto(UserDomain userDomain) { return objectMapper.convertValue(userDomain , UserDto.class); } }

This is my terminal

2021-07-31 13:57:50.549 WARN 13691 --- [nio-8881-exec-1] o.h.e.loading.internal.LoadContexts : HHH000100: Fail-safe cleanup (collections) : org.hibernate.engine.loading.internal.CollectionLoadContext@17f80723<rs=HikariProxyResultSet@763024380 wrapping Result set representing update count of -1> 2021-07-31 13:57:50.549 WARN 13691 --- [nio-8881-exec-1] o.h.e.loading.internal.LoadContexts : HHH000100: Fail-safe cleanup (collections) : org.hibernate.engine.loading.internal.CollectionLoadContext@38b516d2<rs=HikariProxyResultSet@1651373951 wrapping Result set representing update count of -1> 2021-07-31 13:57:50.558 ERROR 13691 --- [nio-8881-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.StackOverflowError] with root cause java.lang.StackOverflowError: null at java.base/java.lang.String.indexOf(String.java:1578) ~[na:na] at java.base/java.lang.String.indexOf(String.java:1535) ~[na:na] at java.base/java.net.URLStreamHandler.parseURL(URLStreamHandler.java:143) ~[na:na] at java.base/sun.net.www.protocol.file.Handler.parseURL(Handler.java:67) ~[na:na] at java.base/java.net.URL.<init>(URL.java:674) ~[na:na] at java.base/java.net.URL.<init>(URL.java:541) ~[na:na] at java.base/jdk.internal.loader.URLClassPath$FileLoader.getResource(URLClassPath.java:1221) ~[na:na] at java.base/jdk.internal.loader.URLClassPath.getResource(URLClassPath.java:314) ~[na:na] at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:695) ~[na:na] at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:621) ~[na:na] at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:579) ~[na:na] at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na] at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[na:na] at com.mysql.cj.jdbc.ClientPreparedStatement.executeQuery(ClientPreparedStatement.java:1020) ~[mysql-connector-java-8.0.25.jar:8.0.25] at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeQuery(ProxyPreparedStatement.java:52) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeQuery(HikariProxyPreparedStatement.java) ~[HikariCP-4.0.3.jar:na] at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:57) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.getResultSet(AbstractLoadPlanBasedLoader.java:390) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeQueryStatement(AbstractLoadPlanBasedLoader.java:163) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:104) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.collection.plan.AbstractLoadPlanBasedCollectionInitializer.initialize(AbstractLoadPlanBasedCollectionInitializer.java:87) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:710) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.event.internal.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:76) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:99) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:2163) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection$4.doWork(AbstractPersistentCollection.java:589) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:264) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:585) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:149) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.PersistentSet.hashCode(PersistentSet.java:458) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at com.examportal.examportalapi.domain.RoleDomain.hashCode(RoleDomain.java:13) ~[classes/:na] at com.examportal.examportalapi.domain.UserRoleDomain.hashCode(UserRoleDomain.java:14) ~[classes/:na] at java.base/java.util.HashMap.hash(HashMap.java:339) ~[na:na] at java.base/java.util.HashMap.put(HashMap.java:607) ~[na:na] at java.base/java.util.HashSet.add(HashSet.java:220) ~[na:na] at java.base/java.util.AbstractCollection.addAll(AbstractCollection.java:352) ~[na:na] at org.hibernate.collection.internal.PersistentSet.endRead(PersistentSet.java:355) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:239) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:224) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:198) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.CollectionReferenceInitializerImpl.endLoading(CollectionReferenceInitializerImpl.java:154) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.AbstractRowReader.finishLoadingCollections(AbstractRowReader.java:253) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.AbstractRowReader.finishUp(AbstractRowReader.java:211) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.ResultSetProcessorImpl.extractResults(ResultSetProcessorImpl.java:96) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:105) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.collection.plan.AbstractLoadPlanBasedCollectionInitializer.initialize(AbstractLoadPlanBasedCollectionInitializer.java:87) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:710) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.event.internal.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:76) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:99) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:2163) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection$4.doWork(AbstractPersistentCollection.java:589) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:264) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:585) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:149) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.PersistentSet.hashCode(PersistentSet.java:458) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at com.examportal.examportalapi.domain.RoleDomain.hashCode(RoleDomain.java:13) ~[classes/:na] at com.examportal.examportalapi.domain.UserRoleDomain.hashCode(UserRoleDomain.java:14) ~[classes/:na] at java.base/java.util.HashMap.hash(HashMap.java:339) ~[na:na] at java.base/java.util.HashMap.put(HashMap.java:607) ~[na:na] at java.base/java.util.HashSet.add(HashSet.java:220) ~[na:na] at java.base/java.util.AbstractCollection.addAll(AbstractCollection.java:352) ~[na:na] at org.hibernate.collection.internal.PersistentSet.endRead(PersistentSet.java:355) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:239) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:224) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:198) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.CollectionReferenceInitializerImpl.endLoading(CollectionReferenceInitializerImpl.java:154) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.AbstractRowReader.finishLoadingCollections(AbstractRowReader.java:253) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.AbstractRowReader.finishUp(AbstractRowReader.java:211) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.ResultSetProcessorImpl.extractResults(ResultSetProcessorImpl.java:96) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:105) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.collection.plan.AbstractLoadPlanBasedCollectionInitializer.initialize(AbstractLoadPlanBasedCollectionInitializer.java:87) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:710) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.event.internal.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:76) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:99) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:2163) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection$4.doWork(AbstractPersistentCollection.java:589) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:264) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:585) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:149) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.PersistentSet.hashCode(PersistentSet.java:458) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at com.examportal.examportalapi.domain.RoleDomain.hashCode(RoleDomain.java:13) ~[classes/:na] at com.examportal.examportalapi.domain.UserRoleDomain.hashCode(UserRoleDomain.java:14) ~[classes/:na] at java.base/java.util.HashMap.hash(HashMap.java:339) ~[na:na] at java.base/java.util.HashMap.put(HashMap.java:607) ~[na:na] at java.base/java.util.HashSet.add(HashSet.java:220) ~[na:na] at java.base/java.util.AbstractCollection.addAll(AbstractCollection.java:352) ~[na:na] at org.hibernate.collection.internal.PersistentSet.endRead(PersistentSet.java:355) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:239) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:224) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:198) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.CollectionReferenceInitializerImpl.endLoading(CollectionReferenceInitializerImpl.java:154) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.AbstractRowReader.finishLoadingCollections(AbstractRowReader.java:253) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.AbstractRowReader.finishUp(AbstractRowReader.java:211) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.ResultSetProcessorImpl.extractResults(ResultSetProcessorImpl.java:96) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:105) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.collection.plan.AbstractLoadPlanBasedCollectionInitializer.initialize(AbstractLoadPlanBasedCollectionInitializer.java:87) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:710) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.event.internal.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:76) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:99) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:2163) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection$4.doWork(AbstractPersistentCollection.java:589) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:264) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:585) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:149) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.PersistentSet.hashCode(PersistentSet.java:458) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at com.examportal.examportalapi.domain.RoleDomain.hashCode(RoleDomain.java:13) ~[classes/:na] at com.examportal.examportalapi.domain.UserRoleDomain.hashCode(UserRoleDomain.java:14) ~[classes/:na] at java.base/java.util.HashMap.hash(HashMap.java:339) ~[na:na] at java.base/java.util.HashMap.put(HashMap.java:607) ~[na:na] at java.base/java.util.HashSet.add(HashSet.java:220) ~[na:na] at java.base/java.util.AbstractCollection.addAll(AbstractCollection.java:352) ~[na:na] at org.hibernate.collection.internal.PersistentSet.endRead(PersistentSet.java:355) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:239) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:224) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.engine.loading.internal.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:198) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.CollectionReferenceInitializerImpl.endLoading(CollectionReferenceInitializerImpl.java:154) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.AbstractRowReader.finishLoadingCollections(AbstractRowReader.java:253) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.AbstractRowReader.finishUp(AbstractRowReader.java:211) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.process.internal.ResultSetProcessorImpl.extractResults(ResultSetProcessorImpl.java:96) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:105) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.loader.collection.plan.AbstractLoadPlanBasedCollectionInitializer.initialize(AbstractLoadPlanBasedCollectionInitializer.java:87) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:710) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.event.internal.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:76) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:99) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:2163) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection$4.doWork(AbstractPersistentCollection.java:589) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:264) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:585) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:149) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at org.hibernate.collection.internal.PersistentSet.hashCode(PersistentSet.java:458) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final] at com.examportal.examportalapi.domain.RoleDomain.hashCode(RoleDomain.java:13) ~[classes/:na] at com.examportal.examportalapi.domain.UserRoleDomain.hashCode(UserRoleDomain.java:14) ~[classes/:na] at java.base/java.util.HashMap.hash(HashMap.java:339) ~[na:na] at java.base/java.util.HashMap.put(HashMap.java:607) ~[na:na] at java.base/java.util.HashSet.add(HashSet.java:220) ~[na:na]
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11
  • It was working fine but i dont know what happened now Commented Jul 31, 2021 at 14:13
  • you have one or more relation is null you have field in database dont has forigen key check the filed in database or delete the relation result into dto Commented Jul 31, 2021 at 14:14
  • Show us RoleDomain.hashCode Commented Jul 31, 2021 at 14:15
  • in dto you have object has null when transfer from entity to dto Commented Jul 31, 2021 at 14:16
  • Also show UserRoleDomain.hashCode Commented Jul 31, 2021 at 14:17

7 Answers 7

Reset to default
11

A Stack Overflow error happens when your code has called too many methods without returning and there are too many methods in the stack, causing it to overflow. This commonly happens when you have an infinite loop where a method calls itself repeatedly.

There is a loop happening in your hashCode method in com.examportal.examportalapi.domain.UserRoleDomain which calls com.examportal.examportalapi.domain.RoleDomain.hashCode.

You have the @Data lombok annotation in these two classes. Replace the @Data annotation with just the features you need in the classes. @Data generates hashCode methods that cause your problem. See the documentation: https://projectlombok.org/features/Data

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7 Comments

have a look at my domain package and other classes here github.com/iqbalrohail/Exam-portal-backend
Hey I took a look and updated my answer, let me know if it's not resolved. @Rohail Iqbal
yes i changed Data annotations in my whole code to simple Lombok annotations and it works for me ie; Setter- -Getter-- AllArgsConstructor --NoArgsConstructor-- ToString
This article (projectlombok.org/features/Data) helps me understanding why it is not good to use @Data , thanks CausingUnderflowsEverywhere
No problem @RohailIqbal remember to up vote helpful answers and down vote not helpful ones and choose an answer to mark as the solution before you go.
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10

Changed @Data annotation with the following Lombok annotations and it worked for me

@Setter

@Getter

@AllArgsConstructor

@NoArgsConstructor

@ToString

@Entity

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use @Data in lombok
1

I encounter this problem and solved this problem with @Data annotation only so that you can solve this problem only @Data annotation as well. you have add @EqualsAndHashCode.Exclude and @ToString.Exclude in your entities.

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0

may be useful. Today I lost a lot of time because i tried to print a List object. It was calling implicitely toString(), but the error came from Unit tests and it was not pointing directly to the class with the problem

List<ArticoliDto> articoli = articoliService.SelByDescrizione("blabla"); //return a List<xxx> logger.info("Trovati articoli: " + articoli); //this causes the error!!

The exception was (partially):

org.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.StackOverflowError at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1082) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:72) at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) at org.springframework.mock.web.MockFilterChain$ServletFilterProxy.doFilter(MockFilterChain.java:167) at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:134) at org.springframework.test.web.servlet.MockMvc.perform(MockMvc.java:199) at com.xantrix.webapp.UnitTest.ControllerTest.SelectArtTest.listArtByDesc(SelectArtTest.java:174) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725) at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131) at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84) at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115) at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
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I faced the same issue. after debugging found out that there was a cycle in my code. after fixing that the error was solved. Please, check for the cycle in your code too. maybe that's the issue.

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when I upgraded the project I did face the same issue, adding "implementation 'org.apache.commons:commons-lang3:3.14.0'" in build.gradle helped me to solve the issue.

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It will be great to have the code of the classes UserDomain and RoleDomain.

I've noticed a potential dependency between UserDomain and RoleDomain. Currently, when saving a UserDomain, it appears to be attempting manual role creation.

I suggest exploring the possibility of eliminating the manual role creation code. Instead, configure the system to handle role creation automatically through the ORM during the process of saving a UserDomain.

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