Could not get constructor for org hibernate persister entity SingleTableEntityPersister

Question

I am actually new to hibernate and tried to set up 2 classes  Account and Person  Now all i try to do is create a one to one bidirectional dependency using annotations  Here are some details and code snippets   Here are my libraries which i added to the build path  maybe i missed anything   http   prntscr com 1jbew4  Account   package backend   import java util Random  import java util Collection  import java util TreeSet  import javax persistence      Entity  Table name    Account   public class Account        public static Random rnd   new Random        private int id      private String username      private long password      private long salt      private Person person      private String role      private Collection lt Account gt  friendlist       public Account                 public Account String username  long password  Person person  String role            super            this username   username          this password   password          this setSalt            this person   person          this role   role          this friendlist   new TreeSet lt Account gt                 Id      GeneratedValue      Column name    Id       public int getId             return id             public void setId int id            this id   id              Column name    Username       public String getUsername             return username             public void setUsername String username            this username   username              Column name    Password       public long getPassword             return password             public void setPassword String password            this password    long  salt   password hashCode                Column name    Salt       public long getSalt             return salt             public void setSalt             this salt   rnd nextLong            if  this salt  lt  0                this salt   this salt    -1                         OneToOne cascade   CascadeType ALL       JoinColumn name    Person FK       public Person getPerson             return person             public void setPerson Person person            this person   person              Column name    Role       public String getRole             return role             public void setRole String role        Person   package backend   import javax persistence      Entity  Table name   Person   public class Person        private int id      private String firstName      private String lastName      private String street      private int houseNumber      private String tel      private String email      private String mobile      private Account account       public Person                 public Person int id  String firstName  String lastName  String street              int houseNumber  String tel  String email  String mobile              Account account            super            this id  id          this firstName   firstName          this lastName   lastName          this street   street          this houseNumber   houseNumber          this tel   tel          this email   email          this mobile   mobile          this account   account              Id      GeneratedValue      Column name  Id       public int getId             return id             public void setId int id            this id   id              Column name  Firstname       public String getFirstName             return firstName             public void setFirstName String firstName            this firstName   firstName               Column name  Lastname       public String getLastName             return lastName             public void setLastName String lastName            this lastName   lastName              Column name  Street       public String getStreet             return street             public void setStreet String street            this street   street              Column name  Housenumber       public int getHouseNumber             return houseNumber             public void setHouseNumber int houseNumber            this houseNumber   houseNumber              Column name  Tel       public String getTel             return tel             public void setTel String tel            this tel   tel              Column name  Email       public String getEmail             return email             public void setEmail String email            this email   email              Column name  Mobile       public String getMobile             return mobile             public void setMobile String mobile            this mobile   mobile              OneToOne mappedBy    person   cascade   CascadeType ALL         public Account getAccount             return account             public void setAccount Account account            this account   account            Hibernate cfg xml    lt  xml version  1 0  encoding  utf-8   gt   lt  DOCTYPE hibernate-configuration PUBLIC          -  Hibernate Hibernate Configuration DTD 3 0  EN           http   hibernate sourceforge net hibernate-configuration-3 0 dtd  gt   lt hibernate-configuration gt       lt session-factory gt           lt  -- Alternative 1  MySQL -- gt            lt  -- Database connection settings  MySQL -- gt           lt property name  connection driver class  gt com mysql jdbc Driver lt  property gt           lt property name  connection url  gt jdbc mysql    chat application db lt  property gt           lt property name  connection username  gt root lt  property gt           lt property name  connection password  gt  lt  property gt           lt property name  dialect  gt org hibernate dialect MySQLDialect lt  property gt             lt  -- JDBC connection pool  use the built-in  -- gt           lt property name  connection pool size  gt 1 lt  property gt             lt  -- Enable Hibernate s automatic session context management -- gt           lt property name  current session context class  gt thread lt  property gt            lt  -- Disable the second-level cache -- gt           lt property name  cache provider class  gt org hibernate cache NoCacheProvider lt  property gt            lt  -- Echo all executed SQL to stdout -- gt           lt property name  show sql  gt true lt  property gt           lt property name  format sql  gt true lt  property gt            lt  -- Drop and re-create the database schema on startup -- gt           lt property name  hbm2ddl auto  gt create lt  property gt            lt property name  hibernate format sql  gt true lt  property gt            lt  -- Auflistung der gemappten Klassen  Package   Class-Name  -- gt           lt mapping class  backend Account   gt           lt mapping class  backend Person   gt            lt  --  lt mapping class  backend Role   gt  -- gt       lt  session-factory gt   lt  hibernate-configuration gt    And here is my problem  when i try to start  a simple main class creating some objects and saving them  just to test  i get this          Error Creating SessionFactory         result of my try-catch before printStackTrace   INFO  HHH000397  Using ASTQueryTranslatorFactory      Error Creating SessionFactory       org hibernate MappingException  Could not get constructor for org hibernate persister entity SingleTableEntityPersister     at org hibernate persister internal PersisterFactoryImpl create PersisterFactoryImpl java 185      at org hibernate persister internal PersisterFactoryImpl createEntityPersister PersisterFactoryImpl java 135      at org hibernate internal SessionFactoryImpl  lt init gt  SessionFactoryImpl java 385      at org hibernate cfg Configuration buildSessionFactory Configuration java 1769      at org hibernate cfg Configuration buildSessionFactory Configuration java 1840      at backend HibernateSessionFactory currentSession HibernateSessionFactory java 21      at backend HibernateSessionFactory getCfg HibernateSessionFactory java 48      at backend Main main Main java 14  Caused by  org hibernate HibernateException  Unable to instantiate default tuplizer  org hibernate tuple entity PojoEntityTuplizer      at org hibernate tuple entity EntityTuplizerFactory constructTuplizer EntityTuplizerFactory java 138      at org hibernate tuple entity EntityTuplizerFactory constructDefaultTuplizer EntityTuplizerFactory java 188      at org hibernate tuple entity EntityMetamodel  lt init gt  EntityMetamodel java 341      at org hibernate persister entity AbstractEntityPersister  lt init gt  AbstractEntityPersister java 507      at org hibernate persister entity SingleTableEntityPersister  lt init gt  SingleTableEntityPersister java 146      at sun reflect NativeConstructorAccessorImpl newInstance0 Native Method      at sun reflect NativeConstructorAccessorImpl newInstance Unknown Source      at sun reflect DelegatingConstructorAccessorImpl newInstance Unknown Source      at java lang reflect Constructor newInstance Unknown Source      at org hibernate persister internal PersisterFactoryImpl create PersisterFactoryImpl java 163          7 more Caused by  java lang reflect InvocationTargetException     at sun reflect NativeConstructorAccessorImpl newInstance0 Native Method      at sun reflect NativeConstructorAccessorImpl newInstance Unknown Source      at sun reflect DelegatingConstructorAccessorImpl newInstance Unknown Source      at java lang reflect Constructor newInstance Unknown Source      at org hibernate tuple entity EntityTuplizerFactory constructTuplizer EntityTuplizerFactory java 135          16 more Caused by  org hibernate PropertyNotFoundException  Could not find a setter for property salt in class backend Account     at org hibernate property BasicPropertyAccessor createSetter BasicPropertyAccessor java 252      at org hibernate property BasicPropertyAccessor getSetter BasicPropertyAccessor java 245      at org hibernate mapping Property getSetter Property java 326      at org hibernate tuple entity PojoEntityTuplizer buildPropertySetter PojoEntityTuplizer java 444      at org hibernate tuple entity AbstractEntityTuplizer  lt init gt  AbstractEntityTuplizer java 201      at org hibernate tuple entity PojoEntityTuplizer  lt init gt  PojoEntityTuplizer java 82          21 more Exception in thread  main  java lang NullPointerException     at backend HibernateSessionFactory currentSession HibernateSessionFactory java 28      at backend HibernateSessionFactory getCfg HibernateSessionFactory java 48      at backend Main main Main java 14    So i really dont know how to handle this exception  I tried to google it and such but all i found out is that some people had spelling mistakes in their code and this was the reason for it  but unfortunately i dont have spellies in my code  Can someone help me  I will be happy to also post  my SessionFactoryCode or the main class if neccessary  Due to the fact that i am new to hibernate i take every advise      BTW  SQL DB is running via XAMPP   Thanks

User · Answer

If you look at the chain of exceptions  the problem is     Caused by  org hibernate PropertyNotFoundException  Could not find a setter for property salt in class backend Account   The problem is that the method Account setSalt   works fine when you create an instance but not when you retrieve an instance from the database  This is because you don t want to create a new salt each time you load an Account   To fix this  create a method setSalt long  with visibility private and Hibernate will be able to set the value  just a note  I think it works with Private  but you might need to make it package or protected

User · Answer

in my case  the problem got solved only by implementing serializable as below    Entity  Table name    User    uniqueConstraints      UniqueConstraint columnNames     nam       public class User extends GenericT implements Serializable

User · Answer

You are missing setter for salt property as indicated by the exception  Please add the setter as    public void setSalt long salt          this salt salt

User · Answer

I resolved this issue by excluding byte-buddy dependency from springfox   lt dependency gt     lt groupId gt io springfox lt  groupId gt     lt artifactId gt springfox-swagger2 lt  artifactId gt     lt version gt 2 7 0 lt  version gt     lt exclusions gt     lt exclusion gt       lt groupId gt net bytebuddy lt  groupId gt       lt artifactId gt byte-buddy lt  artifactId gt     lt  exclusion gt     lt  exclusions gt   lt  dependency gt    lt dependency gt     lt groupId gt io springfox lt  groupId gt     lt artifactId gt springfox-swagger-ui lt  artifactId gt     lt version gt 2 7 0 lt  version gt     lt exclusions gt     lt exclusion gt       lt groupId gt net bytebuddy lt  groupId gt       lt artifactId gt byte-buddy lt  artifactId gt     lt  exclusion gt   lt  exclusions gt   lt  dependency gt

User · Answer

In my case the problem was because of conflicting Jars   Here is the full list of jars which is working absolutely fine for me   antlr-2 7 7 jar byte-buddy-1 8 12 jar c3p0-0 9 5 2 jar classmate-1 3 4 jar dom4j-1 6 1 jar geolatte-geom-1 3 0 jar hibernate-c3p0-5 3 1 Final jar hibernate-commons-annotations-5 0 3 Final jar hibernate-core-5 3 1 Final jar hibernate-envers-5 3 1 Final jar hibernate-jpamodelgen-5 3 1 Final jar hibernate-osgi-5 3 1 Final jar hibernate-proxool-5 3 1 Final jar hibernate-spatial-5 3 1 Final jar jandex-2 0 3 Final jar javassist-3 22 0-GA jar javax interceptor-api-1 2 jar javax persistence-api-2 2 jar jboss-logging-3 3 2 Final jar jboss-transaction-api 1 2 spec-1 1 1 Final jar jts-core-1 14 0 jar mchange-commons-java-0 2 11 jar mysql-connector-java-5 1 21 jar org osgi compendium-4 3 1 jar org osgi core-4 3 1 jar postgresql-42 2 2 jar proxool-0 8 3 jar slf4j-api-1 6 1 jar

User · Answer

I encountered this error when upgrading from jdk10 to jdk11  Adding the following dependency fixed the problem    lt dependency gt       lt groupId gt org javassist lt  groupId gt       lt artifactId gt javassist lt  artifactId gt       lt version gt 3 25 0-GA lt  version gt   lt  dependency gt

[java] Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister

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