When creating a config node, Node Host is not a required field and node can be create without it. However, if user enters a host name and creates a node, if user then wants to clear this field, the following error is displayed on Save:
An error has occurred
javax.validation.ConstraintViolationException: Constraints for this Node configuration have been violated: on property [ nodeHost ] violation reason [ Invalid nodehost name. Name must start with a letter or number and may contain only letters, numbers, and certain other characters. ]
User should be able to clear node host field.