Unable to instantiate default tuplizer org hibernate tuple entity PojoEntityTuplizer

Question

I am developing an application with Hibernate and I get an Exception when I connect with database  The exception is   Unable to instantiate default tuplizer  org hibernate tuple entity PojoEntityTuplizer    My mapping file is    lt hibernate-mapping gt   lt class name  com cartif database SetPoint  table  SetPoint  gt       lt id name  iSetPointId  column  setpointid  type  java lang Integer  gt           lt generator class  sequence  gt               lt param name  sequence  gt s setpoint lt  param gt           lt  generator gt       lt  id gt       lt property column  sensorType  generated  never  lazy  false  name  sSensortype  type  java lang String   gt       lt property column  value  generated  never  lazy  false  name  dValue  type  java lang Double   gt       lt property column  relationship  generated  never  lazy  false  name  sRelation  type  java lang String   gt       lt property column  deviceid  generated  never  lazy  false  name  iDeviceId  type  java lang Integer   gt   lt  class gt   lt  hibernate-mapping gt    And the class with getters setters which are not included   public class SetPoint       private int iSetPointId      private String sSensorType      private double dValue      private String sRelationship      private int iDeviceId      I have javassist jar included into classpath  I do not know what is the problem  Someone would help me please   Thanks     I found when the error is launched  If I include properties in mapping file exception is thrown  If I only declare id of table  the exception is not thrown  What is the possible cause     The complete stacktrace is   162980  btpool0-2 -  Gateway zigbeedriver app  ERROR org hibernate proxy pojo BasicLazyInitializer  - Javassist Enhancement failed  com cartif database ApplicationField java lang RuntimeException  by java lang NoClassDefFoundError    javassist util proxy ProxyObject at javassist util proxy ProxyFactory createClass ProxyFactory java 174  at org hibernate proxy pojo javassist JavassistLazyInitializer getProxyFactory JavassistLazyInitializer java 162  at org hibernate proxy pojo javassist JavassistProxyFactory postInstantiate JavassistProxyFactory java 65  at org hibernate tuple entity PojoEntityTuplizer buildProxyFactory PojoEntityTuplizer java 185  at org hibernate tuple entity AbstractEntityTuplizer  lt init gt  AbstractEntityTuplizer java 167  at org hibernate tuple entity PojoEntityTuplizer  lt init gt  PojoEntityTuplizer java 77  at sun reflect GeneratedConstructorAccessor12 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 105  at org hibernate tuple entity EntityTuplizerFactory constructDefaultTuplizer EntityTuplizerFactory java 133  at org hibernate tuple entity EntityEntityModeToTuplizerMapping  lt init gt  EntityEntityModeToTuplizerMapping java 80  at org hibernate tuple entity EntityMetamodel  lt init gt  EntityMetamodel java 322  at org hibernate persister entity AbstractEntityPersister  lt init gt  AbstractEntityPersister java 485  at org hibernate persister entity SingleTableEntityPersister  lt init gt  SingleTableEntityPersister java 133  at org hibernate persister PersisterFactory createClassPersister PersisterFactory java 84  at org hibernate impl SessionFactoryImpl  lt init gt  SessionFactoryImpl java 286  at org hibernate cfg Configuration buildSessionFactory Configuration java 1845  at com db manager DatabaseManager createSession DatabaseManager java 74  at com db manager DatabaseManager loadObject DatabaseManager java 95  at com cartif database User loadUser User java 53  at com cartif database User checkUser User java 57  at com cartif zigbee ZigbeeDriverImpl checkUser ZigbeeDriverImpl java 124  at sun reflect NativeMethodAccessorImpl invoke0 Native Method  at sun reflect NativeMethodAccessorImpl invoke Unknown Source  at sun reflect DelegatingMethodAccessorImpl invoke Unknown Source  at java lang reflect Method invoke Unknown Source  at org springframework aop support AopUtils invokeJoinpointUsingReflection AopUtils java 307  at org springframework osgi service importer support internal aop ServiceInvoker doInvoke ServiceInvoker java 58  at org springframework osgi service importer support internal aop ServiceInvoker invoke ServiceInvoker java 62  at org springframework aop framework ReflectiveMethodInvocation proceed ReflectiveMethodInvocation java 171  at org springframework aop support DelegatingIntroductionInterceptor doProceed DelegatingIntroductionInterceptor java 131  at org springframework aop support DelegatingIntroductionInterceptor invoke DelegatingIntroductionInterceptor java 119  at org springframework aop framework ReflectiveMethodInvocation proceed ReflectiveMethodInvocation java 171  at org springframework osgi service util internal aop ServiceTCCLInterceptor invokeUnprivileged ServiceTCCLInterceptor java 56  at org springframework osgi service util internal aop ServiceTCCLInterceptor invoke ServiceTCCLInterceptor java 39  at org springframework aop framework ReflectiveMethodInvocation proceed ReflectiveMethodInvocation java 171  at org springframework osgi service importer support LocalBundleContextAdvice invoke LocalBundleContextAdvice java 59  at org springframework aop framework ReflectiveMethodInvocation proceed ReflectiveMethodInvocation java 171  at org springframework aop support DelegatingIntroductionInterceptor doProceed DelegatingIntroductionInterceptor java 131  at org springframework aop support DelegatingIntroductionInterceptor invoke DelegatingIntroductionInterceptor java 119  at org springframework aop framework ReflectiveMethodInvocation proceed ReflectiveMethodInvocation java 171  at org springframework aop framework JdkDynamicAopProxy invoke JdkDynamicAopProxy java 204  at  Proxy21 checkUser Unknown Source  at main com cartif app server AppServiceImpl getUser AppServiceImpl java 39  at sun reflect NativeMethodAccessorImpl invoke0 Native Method  at sun reflect NativeMethodAccessorImpl invoke Unknown Source  at sun reflect DelegatingMethodAccessorImpl invoke Unknown Source  at java lang reflect Method invoke Unknown Source  at com google gwt user server rpc RPC invokeAndEncodeResponse RPC java 569  at com google gwt user server rpc RemoteServiceServlet processCall RemoteServiceServlet java 208  at com google gwt user server rpc RemoteServiceServlet processPost RemoteServiceServlet java 248  at com google gwt user server rpc AbstractRemoteServiceServlet doPost AbstractRemoteServiceServlet java 62  at javax servlet http HttpServlet service HttpServlet java 727  at main com cartif app server AppServiceImpl service AppServiceImpl java 33  at javax servlet http HttpServlet service HttpServlet java 820  at org mortbay jetty servlet ServletHolder handle ServletHolder java 487  at org mortbay jetty servlet ServletHandler handle ServletHandler java 362  at org mortbay jetty security SecurityHandler handle SecurityHandler java 216  at org mortbay jetty servlet SessionHandler handle SessionHandler java 181  at org mortbay jetty handler ContextHandler handle ContextHandler java 726  at org mortbay jetty webapp WebAppContext handle WebAppContext java 405  at org mortbay jetty handler ContextHandlerCollection handle ContextHandlerCollection java 206  at org mortbay jetty handler HandlerCollection handle HandlerCollection java 114  at org mortbay jetty handler HandlerWrapper handle HandlerWrapper java 152  at org mortbay jetty Server handle Server java 320  at org mortbay jetty HttpConnection handleRequest HttpConnection java 505  at org mortbay jetty HttpConnection RequestHandler content HttpConnection java 842  at org mortbay jetty HttpParser parseNext HttpParser java 648  at org mortbay jetty HttpParser parseAvailable HttpParser java 211  at org mortbay jetty HttpConnection handle HttpConnection java 380  at org mortbay io nio SelectChannelEndPoint run SelectChannelEndPoint java 395  at org mortbay thread BoundedThreadPool PoolThread run BoundedThreadPool java 450  Caused by  javassist CannotCompileException  by java lang NoClassDefFoundError  javassist util proxy ProxyObject at javassist util proxy FactoryHelper toClass FactoryHelper java 167  at javassist util proxy ProxyFactory createClass ProxyFactory java 170      72 more Caused by  java lang NoClassDefFoundError  javassist util proxy ProxyObject at java lang ClassLoader defineClass1 Native Method  at java lang ClassLoader defineClassCond Unknown Source  at java lang ClassLoader defineClass Unknown Source  at sun reflect NativeMethodAccessorImpl invoke0 Native Method  at sun reflect NativeMethodAccessorImpl invoke Unknown Source  at sun reflect DelegatingMethodAccessorImpl invoke Unknown Source  at java lang reflect Method invoke Unknown Source  at javassist util proxy FactoryHelper toClass FactoryHelper java 159      73 more Caused by  java lang ClassNotFoundException  javassist util proxy ProxyObject at org eclipse osgi internal loader BundleLoader findClassInternal BundleLoader java 506  at org eclipse osgi internal loader BundleLoader findClass BundleLoader java 422  at org eclipse osgi internal loader BundleLoader findClass BundleLoader java 410  at org eclipse osgi internal baseadaptor DefaultClassLoader loadClass DefaultClassLoader java 107  at java lang ClassLoader loadClass Unknown Source      81 more 163012  btpool0-2 -  Gateway zigbeedriver app  WARN   org hibernate tuple entity PojoEntityTuplizer  - could not create proxy factory for com cartif database ApplicationField org hibernate HibernateException  Javassist Enhancement failed  com cartif database ApplicationField at org hibernate proxy pojo javassist JavassistLazyInitializer getProxyFactory JavassistLazyInitializer java 169  at org hibernate proxy pojo javassist JavassistProxyFactory postInstantiate JavassistProxyFactory java 65  at org hibernate tuple entity PojoEntityTuplizer buildProxyFactory PojoEntityTuplizer java 185  at org hibernate tuple entity AbstractEntityTuplizer  lt init gt  AbstractEntityTuplizer java 167  at org hibernate tuple entity PojoEntityTuplizer  lt init gt  PojoEntityTuplizer java 77  at sun reflect GeneratedConstructorAccessor12 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 105  at org hibernate tuple entity EntityTuplizerFactory constructDefaultTuplizer EntityTuplizerFactory java 133  at org hibernate tuple entity EntityEntityModeToTuplizerMapping  lt init gt  EntityEntityModeToTuplizerMapping java 80  at org hibernate tuple entity EntityMetamodel  lt init gt  EntityMetamodel java 322  at org hibernate persister entity AbstractEntityPersister  lt init gt  AbstractEntityPersister java 485  at org hibernate persister entity SingleTableEntityPersister  lt init gt  SingleTableEntityPersister java 133  at org hibernate persister PersisterFactory createClassPersister PersisterFactory java 84  at org hibernate impl SessionFactoryImpl  lt init gt  SessionFactoryImpl java 286  at org hibernate cfg Configuration buildSessionFactory Configuration java 1845  at com db manager DatabaseManager createSession DatabaseManager java 74  at com db manager DatabaseManager loadObject DatabaseManager java 95  at com cartif database User loadUser User java 53  at com cartif database User checkUser User java 57  at com cartif zigbee ZigbeeDriverImpl checkUser ZigbeeDriverImpl java 124  at sun reflect NativeMethodAccessorImpl invoke0 Native Method  at sun reflect NativeMethodAccessorImpl invoke Unknown Source  at sun reflect DelegatingMethodAccessorImpl invoke Unknown Source  at java lang reflect Method invoke Unknown Source  at org springframework aop support AopUtils invokeJoinpointUsingReflection AopUtils java 307  at org springframework osgi service importer support internal aop ServiceInvoker doInvoke ServiceInvoker java 58  at org springframework osgi service importer support internal aop ServiceInvoker invoke ServiceInvoker java 62  at org springframework aop framework ReflectiveMethodInvocation proceed ReflectiveMethodInvocation java 171  at org springframework aop support DelegatingIntroductionInterceptor doProceed DelegatingIntroductionInterceptor java 131  at org springframework aop support DelegatingIntroductionInterceptor invoke DelegatingIntroductionInterceptor java 119  at org springframework aop framework ReflectiveMethodInvocation proceed ReflectiveMethodInvocation java 171  at org springframework osgi service util internal aop ServiceTCCLInterceptor invokeUnprivileged ServiceTCCLInterceptor java 56  at org springframework osgi service util internal aop ServiceTCCLInterceptor invoke ServiceTCCLInterceptor java 39  at org springframework aop framework ReflectiveMethodInvocation proceed ReflectiveMethodInvocation java 171  at org springframework osgi service importer support LocalBundleContextAdvice invoke LocalBundleContextAdvice java 59  at org springframework aop framework ReflectiveMethodInvocation proceed ReflectiveMethodInvocation java 171  at org springframework aop support DelegatingIntroductionInterceptor doProceed DelegatingIntroductionInterceptor java 131  at org springframework aop support DelegatingIntroductionInterceptor invoke DelegatingIntroductionInterceptor java 119  at org springframework aop framework ReflectiveMethodInvocation proceed ReflectiveMethodInvocation java 171  at org springframework aop framework JdkDynamicAopProxy invoke JdkDynamicAopProxy java 204  at  Proxy21 checkUser Unknown Source  at main com cartif app server AppServiceImpl getUser AppServiceImpl java 39  at sun reflect NativeMethodAccessorImpl invoke0 Native Method  at sun reflect NativeMethodAccessorImpl invoke Unknown Source  at sun reflect DelegatingMethodAccessorImpl invoke Unknown Source  at java lang reflect Method invoke Unknown Source  at com google gwt user server rpc RPC invokeAndEncodeResponse RPC java 569  at com google gwt user server rpc RemoteServiceServlet processCall RemoteServiceServlet java 208  at com google gwt user server rpc RemoteServiceServlet processPost RemoteServiceServlet java 248  at com google gwt user server rpc AbstractRemoteServiceServlet doPost AbstractRemoteServiceServlet java 62  at javax servlet http HttpServlet service HttpServlet java 727  at main com cartif app server AppServiceImpl service AppServiceImpl java 33  at javax servlet http HttpServlet service HttpServlet java 820  at org mortbay jetty servlet ServletHolder handle ServletHolder java 487  at org mortbay jetty servlet ServletHandler handle ServletHandler java 362  at org mortbay jetty security SecurityHandler handle SecurityHandler java 216  at org mortbay jetty servlet SessionHandler handle SessionHandler java 181  at org mortbay jetty handler ContextHandler handle ContextHandler java 726  at org mortbay jetty webapp WebAppContext handle WebAppContext java 405  at org mortbay jetty handler ContextHandlerCollection handle ContextHandlerCollection java 206  at org mortbay jetty handler HandlerCollection handle HandlerCollection java 114  at org mortbay jetty handler HandlerWrapper handle HandlerWrapper java 152  at org mortbay jetty Server handle Server java 320  at org mortbay jetty HttpConnection handleRequest HttpConnection java 505  at org mortbay jetty HttpConnection RequestHandler content HttpConnection java 842  at org mortbay jetty HttpParser parseNext HttpParser java 648  at org mortbay jetty HttpParser parseAvailable HttpParser java 211  at org mortbay jetty HttpConnection handle HttpConnection java 380  at org mortbay io nio SelectChannelEndPoint run SelectChannelEndPoint java 395  at org mortbay thread BoundedThreadPool PoolThread run BoundedThreadPool java 450  Caused by  java lang RuntimeException  by java lang NoClassDefFoundError  javassist util proxy ProxyObject at javassist util proxy ProxyFactory createClass ProxyFactory java 174  at org hibernate proxy pojo javassist JavassistLazyInitializer getProxyFactory JavassistLazyInitializer java 162      71 more Caused by  javassist CannotCompileException  by java lang NoClassDefFoundError  javassist util proxy ProxyObject at javassist util proxy FactoryHelper toClass FactoryHelper java 167  at javassist util proxy ProxyFactory createClass ProxyFactory java 170      72 more Caused by  java lang NoClassDefFoundError  javassist util proxy ProxyObject at java lang ClassLoader defineClass1 Native Method  at java lang ClassLoader defineClassCond Unknown Source  at java lang ClassLoader defineClass Unknown Source  at sun reflect NativeMethodAccessorImpl invoke0 Native Method  at sun reflect NativeMethodAccessorImpl invoke Unknown Source  at sun reflect DelegatingMethodAccessorImpl invoke Unknown Source  at java lang reflect Method invoke Unknown Source  at javassist util proxy FactoryHelper toClass FactoryHelper java 159      73 more Caused by  java lang ClassNotFoundException  javassist util proxy ProxyObject at org eclipse osgi internal loader BundleLoader findClassInternal BundleLoader java 506  at org eclipse osgi internal loader BundleLoader findClass BundleLoader java 422  at org eclipse osgi internal loader BundleLoader findClass BundleLoader java 410  at org eclipse osgi internal baseadaptor DefaultClassLoader loadClass DefaultClassLoader java 107  at java lang ClassLoader loadClass Unknown Source      81 more

User · Answer

In my case I had a Kotlin class with some fields which were not open so the generated Java setters and getters would be final. Solved it by adding open keyword to each field.

Before:

open class User(
    var id: String = "",
    var email: String = ""
)

After:

open class User(
    open var id: String = "",
    open var email: String = ""
)

User · Answer

I know its an old question and lots of answers are helpful but in my case  I faced with the same error unluckily the reason was different   Spring boot version 2 0 5 RELEASE  If you are using      IntelliJ idea 2018 1 5 or above  and you set JDK version as JDK 11    the same exception occurred  After updating the      JDK version as 8   the error is gone

User · Answer

I had the same problem and resolved it adding this dependency    lt dependency gt       lt groupId gt javassist lt  groupId gt       lt artifactId gt javassist lt  artifactId gt       lt version gt 3 12 1 GA lt  version gt   lt  dependency gt       I am using hibernate 3 6 version

User · Answer

When I ran into this error the fix was simple  I was simply missing a setter for a property  Make sure you define matching getters   setters for all your properties

User · Answer

Add the following to your pom xml and take out the dependency from asm jars from hibernate and add separate dependency to asm in a separate section  I did the same and it worked in one shot            lt  -- Hibernate core -- gt       lt dependency gt         lt groupId gt org hibernate lt  groupId gt         lt artifactId gt hibernate lt  artifactId gt         lt version gt 3 2 7 ga lt  version gt       lt exclusions gt               lt exclusion gt            lt groupId gt asm lt  groupId gt               lt artifactId gt asm lt  artifactId gt            lt  exclusion gt         lt exclusion gt                lt groupId gt asm lt  groupId gt               lt artifactId gt asm-attrs lt  artifactId gt             lt  exclusion gt         lt  exclusions gt       lt  dependency gt         lt dependency gt         lt groupId gt asm lt  groupId gt         lt artifactId gt asm lt  artifactId gt         lt version gt 3 1 lt  version gt

User · Answer

My issue was due to version conflict   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

I had a similar problem and after going over a lot on stack overflow and spending time on the jar dependencies  I figured out that in my case  I had two sets of asm jar  I removed one of them and it worked fine

User · Answer

I was also facing the same issue   Added the same dependency and it worked  like this     lt dependency gt       lt groupId gt javassist lt  groupId gt       lt artifactId gt javassist lt  artifactId gt       lt version gt 3 12 1 GA lt  version gt   lt  dependency gt

User · Answer

In my case I had a isSomething   boolean getter and got this error   I resolved it by annotating the method with the JPA  Transient annotation and find a confirmation in an answer to this SO question  so telling the provider not to persist the attribute

User · Answer

Check your Hibernate mapping file   hbm xml and check the class with which you are creating the getter and setter methods  Every property in the mapping file should exist as getters and setters in the populating class  Once you fix that the error is solved   Also by reading the console  you can probably see the error mentioning a missing getter setter   Hope this helps you

User · Answer

Please do check Hibernate Property Name and Id Name also

User · Answer

I was getting the same error even after adding no-arg constructor Then I figured out that I was missing several JARs I am posting this so that if anyone gets the error like I got  make sure you have added these JARs in your lib folder    activation-1 0 2 jar antlr-2 7 6 jar aopalliance jar asm-1 5 3 jar asm-attrs-1 5 3 jar cglib-2 1 3 jar commons-beanutils-1 7 0 jar commons-collections-2 1 1 jar commons-digester-1 8 jar commons-email-1 0 jar commons-fileupload-1 1 1 jar commons-io-1 1 jar commons-lang-2 5 jar commons-logging-1 1 3 jar dom4j-1 6 1 jar dumbster-1 6 jar ehcache-1 2 3 jar ejb3-persistence-3 3 1 jar hibernate-commons-annotations-4 0 4 Final jar hibernate-core-4 2 8 Final jar icu4j-2 6 1 jar javassist-3 4 GA jar javax persistence 2 0 3 v201010191057 jar javax servlet jsp jstl-1 2 1 jar jaxb-api-2 1 jar jaxb-impl-2 1 3 jar jaxen-1 1 1 jar jboss-logging-3 1 3 GA jar jdom-1 0 jar jstl-1 2 jar jta-1 1 jar lucene-core-2 3 2 jar lucene-highlighter-2 0 0 jar mail-1 4 jar mysql-connector-java-5 0 8-bin jar org springframework orm jar slf4j-api-1 6 1 jar slf4j-log4j12-1 5 6 jar spring-aop-4 0 0 RELEASE jar spring-aspects-4 0 0 RELEASE-javadoc jar spring-beans-4 0 0 RELEASE jar spring-build-src-4 0 0 RELEASE jar spring-context-4 0 0 RELEASE jar spring-core-4 0 0 RELEASE jar spring-expression-4 0 0 RELEASE jar spring-framework-bom-4 0 0 RELEASE jar spring-jdbc-4 0 0 RELEASE jar spring-orm-4 0 0 RELEASE jar spring-tx-4 0 0 RELEASE jar spring-web-4 0 0 RELEASE jar spring-webmvc-4 0 0 RELEASE jar stax-api-1 0-2 jar validation-api-1 0 0 GA jar xalan-2 6 0 jar xercesImpl-2 6 2 jar xml-apis-1 3 02 jar xmlParserAPIs-2 6 2 jar xom-1 0 jar

User · Answer

In my case has helped to exclude javax transaction jta dependency from hibernate    lt dependency gt     lt groupId gt org hibernate lt  groupId gt     lt artifactId gt hibernate lt  artifactId gt     lt version gt 3 2 7 ga lt  version gt     lt exclusions gt       lt exclusion gt         lt groupId gt javax transaction lt  groupId gt         lt artifactId gt jta lt  artifactId gt       lt  exclusion gt     lt  exclusions gt   lt  dependency gt

User · Answer

I had the same exception and I was excluding javassist because of its issue with powermock  Then I was adding it again as below but it was not working    lt dependency gt      lt groupId gt org powermock lt  groupId gt      lt artifactId gt powermock-module-junit4 lt  artifactId gt      lt version gt 1 7 0 lt  version gt      lt scope gt test lt  scope gt      lt exclusions gt         lt exclusion gt            lt groupId gt org javassist lt  groupId gt            lt artifactId gt javassist lt  artifactId gt         lt  exclusion gt      lt  exclusions gt   lt  dependency gt    lt dependency gt      lt groupId gt org javassist lt  groupId gt      lt artifactId gt javassist lt  artifactId gt      lt version gt 3 20 0-GA lt  version gt      lt scope gt test lt  scope gt   lt  dependency gt    Finally I found out that I have to remove  lt scope gt test lt  scope gt  from javassist dependency  Hope it helps someone

User · Answer

Set the  long  type of id instead of java lang Integer  And add getters and setters to your fields

User · Answer

This issue is created due to  name  iSetPointId  make  i  capital and corresponding model class changes

User · Answer

I am using spring 3 0 and Hibernate 3 6 in my project  I ran into the same error just now  Googling this error message brought me to this page   Funtik s comment on Jan 17  12 at 8 49 helped me resolve the issue-   This tells me that javassist cannot be accessed  How do you include this library into the project    So  I included java assist in my maven pom file as below    lt dependency gt       lt groupId gt javassist lt  groupId gt       lt artifactId gt javassist lt  artifactId gt       lt version gt 3 12 1 GA lt  version gt   lt  dependency gt    This resolved the issue for me  Thanks Funtik

User · Answer

I know this post is old  but i ran in the same problem  and i solved it by simply changing my configuration from Java 11 down to Java 8

User · Answer

For me this was resolved by adding an explicit default constructor  public MyClassName

User · Answer

According to the stack trace   Caused by  java lang NoClassDefFoundError  javassist util proxy ProxyObject at     java lang ClassLoader defineClass1 Native Method    The issue is caused by  java lang NoClassDefFoundError   so I think you should focus on this   The direct solution is to add dependency    lt dependency gt       lt groupId gt javassist lt  groupId gt       lt artifactId gt javassist lt  artifactId gt       lt version gt 3 12 1 GA lt  version gt   lt  dependency gt    to your pom xml

[java] Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]

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