infinite recursion when Validator do rejectValue [DATAREST-949]

benkuly opened DATAREST-949 and commented

When a Validator for a Spring Data REST Event do rejectValues(fieldName, errorCode) on the Errors Object and the fieldName is associated to an Entity with many relations, you can get an infinite recursion, because Jackson seems to try to render the "invalidValue" he usually returns as Json-Error-Response.

Example:
Two Classes: Treasure, User
Treasure has an Name and an Owner and User a Set of Treasure (that´s the cycle).
When I now try to PUT { "name": "test", "owner":"https://localhost:8443/api/user/2" } on an existing Treasure and the Validator do errors.rejectValues("owner", "error.wrongRole") the problem occures

Affects: 2.5.5 (Hopper SR5)