erichmx opened a new issue, #14473:
URL: https://github.com/apache/grails-core/issues/14473

   I'm having a weird error with a plugin, but I think it is a race condition 
in HibernateMappingContextConfiguration, long story short, it gives me a 
NullPointerException on the line 
[266](https://github.com/grails/gorm-hibernate5/blob/master/grails-datastore-gorm-hibernate5/src/main/groovy/org/grails/orm/hibernate/cfg/HibernateMappingContextConfiguration.java#L260)
 `((ServiceRegistryImplementor)serviceRegistry).destroy();`
   
   From what I see, **the SessionFactoryObserver is set before the 
serviceRegistry is created** therefore leading to a NPE in some cases, and so 
my app runs some times and other times it flops with NPE. I don't really 
understand why sessionFactoryImple.Close() is being called, and this may be 
another problem.
   
   ```java
   
           setSessionFactoryObserver(new SessionFactoryObserver() {
               private static final long serialVersionUID = 1;
               public void sessionFactoryCreated(SessionFactory factory) {}
               public void sessionFactoryClosed(SessionFactory factory) {
                   ((ServiceRegistryImplementor)serviceRegistry).destroy();
               }
           });
   
           StandardServiceRegistryBuilder standardServiceRegistryBuilder = 
createStandardServiceRegistryBuilder(bootstrapServiceRegistry)
                                                                                
       .applySettings(getProperties());
   
           StandardServiceRegistry serviceRegistry = 
standardServiceRegistryBuilder.build();
           sessionFactory = super.buildSessionFactory(serviceRegistry);
           this.serviceRegistry = serviceRegistry;
   
   ```
   Am I wrong thinking this may produce a race condition?
   
   Here is more detail of  issue  
https://github.com/mathpere/grails-hibernate-search-plugin/issues/33
   


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