output: #fixed code
                                  public void refreshProxiedFactory() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException, NoSuchFieldException {
          // refresh registry
          try {
              Class entityManagerFactoryRegistryClazz = loadClass("org.hibernate.ejb.internal.EntityManagerFactoryRegistry");
              Object instance = ReflectionHelper.get(null, entityManagerFactoryRegistryClazz, "INSTANCE");
              ReflectionHelper.invoke(instance, entityManagerFactoryRegistryClazz, "removeEntityManagerFactory",
                      new Class[] {String.class, EntityManagerFactory.class}, persistenceUnitName, currentInstance);
          } catch (Exception e) {
              LOGGER.error("Unable to clear previous instance of entity manager factory");
          }
  
  
          buildFreshEntityManagerFactory();
      }
input: #vulnerable code 
                                  public void refreshProxiedFactory() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException, NoSuchFieldException {
          // refresh registry
          EntityManagerFactoryRegistry.INSTANCE.removeEntityManagerFactory(persistenceUnitName, currentInstance);
  
          // from HibernatePersistence.createContainerEntityManagerFactory()
          buildFreshEntityManagerFactory();
      } 
                              #location 6 
                              #vulnerability type THREAD_SAFETY_VIOLATION