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org.springframework.web.util.NestedServletException:

Request processing failed; nested exception is

org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: Infinite recursion (StackOverflowError); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Infinite recursion (StackOverflowError) (through reference chain: com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.prgrms.ohouse.domain.user.model.User["cart"]->com.prgrms.ohouse.domain.commerce.model.cart.Cart["user"]->com.pr...

• 양방향 연관관계로 인해서 무한 루프 발생

• @JsonIgnore 필요