SpringSource/spring-integration — pull request #623 by garyrussell (2012-09-13 21:50:40+00:00)
Title: INT-2748 Change CircuitBreaker Exception

Previously, when the breaker was open, it threw a
MessagingException. This was not wrapped so normal
error-channel processing 'payload.cause.message'
failed because the cause was null.

Change the exception to a new private
CircuitBreakerOpenException.