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

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)
      ...