org.hibernate.WrongClassException when loading entity from a shared cache region in JBoss EAP 7

Environment

• Red Hat JBoss Enterprise Application Platform (EAP) 7
• Hibernate 5
• Infinispan 8

Issue

• Two root entities share the same cache region and may have equivalent key values

      @Entity
      @Cache(... region="shared-region")
      public class Employee ... {
          @Id
          private String name;
  
          ...
      }
  
      @Entity
      @Cache(... region="shared-region")
      public class Candidate ... {
          @Id
          private String name;
  
          ...
      }
  

• When retrieving an entity (e.g. by ID) from the cache, WrongClassException is sometimes raised.

  ... org.hibernate.WrongClassException: Object [id=John Smith] was not of the specified subclass [support.hibernate.entity.Employee] : loaded object was of wrong class class support.hibernate.entity.Candidate
  	...
  	at org.hibernate.jpa.spi.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:1075)
  	...
  

Resolution

Content from issues.jboss.org is not included.JBEAP-7483 is resolved in Red Hat JBoss Enterprise Application Platform (EAP) 7.0 CP05 and later.

Root Cause

• This is a known defect (Content from issues.jboss.org is not included.JBEAP-7483)
• See also Content from hibernate.atlassian.net is not included.HHH-11083

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