CODEWITHSUNDEEP
javahibernatejpaproxy
zack
zack

Reputation: 9

HIbernate JPA caused by incompatible with javassist.util.proxy.Proxy

HIbernate JPA caused by incompatible with javassist.util.proxy.Proxy.

Code

public class EntityA {
    @Id
    private String id;

    @OneToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "entityB_id")
    private EntityB entityB;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "entityC_id")
    private EntityC entityC;
}

String sql = "select o from EntityA o "
        + "left outer join o.entityB as o1 ";
final TypedQuery<EntityA> query = getEm().createQuery(sql, EntityA.class);

final List<EntityA> result = query.getResultList();

Questions

When ran above query will get below exception, did anyone have an idea?

My query didn't involved the "EntityC", why the exception will throw with regarding the EntityC at getResultList() method?

Exception

Caused by: java.lang.ClassCastException: xxx.xx.xx.EntityC_$$_javassist_105 incompatible with javassist.util.proxy.Proxy
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:148)
at org.hibernate.proxy.pojo.javassist.JavassistProxyFactory.getProxy(JavassistProxyFactory.java:73)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:758)
at org.hibernate.persister.entity.AbstractEntityPersister.createProxy(AbstractEntityPersister.java:4419)
at org.hibernate.event.internal.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:334)
at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:260)
at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:152)
at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1053)
at org.hibernate.internal.SessionImpl.internalLoad(SessionImpl.java:980)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:714)
at org.hibernate.type.EntityType.resolve(EntityType.java:502)
at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:168)
at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:137)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:1112)
at org.hibernate.loader.Loader.processResultSet(Loader.java:969)
at org.hibernate.loader.Loader.doQuery(Loader.java:917)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:348)
at org.hibernate.loader.Loader.doList(Loader.java:2550)
at org.hibernate.loader.Loader.doList(Loader.java:2536)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2366)
at org.hibernate.loader.Loader.list(Loader.java:2361)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:495)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:357)
at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:198)
at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1230)
at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101)
at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:268)
at sun.reflect.GeneratedMethodAccessor213.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:56)
at java.lang.reflect.Method.invoke(Method.java:620)
at org.springframework.orm.jpa.SharedEntityManagerCreator$DeferredQueryInvocationHandler.invoke(SharedEntityManagerCreator.java:368)
at com.sun.proxy.$Proxy153.getResultList(Unknown Source)
at com.cimb.module.payment.bill.ce.dao.CEMYCCPayeeAccessBean.findNormalByPayeeNameKeyword(CEMYCCPayeeAccessBean.java:59)
at com.cimb.module.payment.bill.atom.RetrieveBillerByKeywordMYAtom.performNormalBillerSearch(RetrieveBillerByKeywordMYAtom.java:58)
at com.cimb.module.payment.bill.atom.RetrieveBillerByKeywordMYAtom.proceedNextStep(RetrieveBillerByKeywordMYAtom.java:45)
at core.logic.DefaultLogicProcessor.process(DefaultLogicProcessor.java:78)
... 94 more

Upvotes: 1

Views: 5672

Answers (1)

BananZ
BananZ

Reputation: 1193

Ok i have encountered this problem too. After some research here is my conclusion:

  1. javassist is too old or missing For older Spring version, you have to add / update your javassist. You can get the latest from the Maven repositorty. Link Here!

  2. If you are getting org.hibernate.LazyInitializationException: could not initialize proxy - no Session error, it is due to you are trying to do lazy load after your connection has been closed. You may need to add a @Transactional annotation in your service / controller (depending on your project's design), in either class level or method level.

Upvotes: 1

Related Questions