HTR:

1. Add an eventListener using reviewService.getReviewDetails() in the event handling thread

       @EventListener
       public void onReviewEvent(final ReviewStateChangedEvent event) {
           impersonationService.doPrivilegedAction(null, new Operation<Object, RuntimeException>() {
               @Override
               public Object perform() throws RuntimeException {
                   return reviewService.getReviewDetails(event.getReviewId());
               }
           });
       }
   

2. Create a review through the REST API (POST /rest-service/reviews-v1.json)
3. Try to transition the review through the REST API (POST /rest-service/reviews-v1/CR-7/transition?action=action:submitReview)
4. The second call never returns

What's happening is that the original transaction is not closed when publishing the event, and requesting revision details for the first time triggers a separate transaction in the retriable thread pool. The two transactions deadlock in the db (tested with postgres) and never return.