MappingException：升级

Question

将Symfony从2.6升级到3.2后，我的一个用户的日志中出现此错误，但我不确定如何重现它：

request.CRITICAL: Uncaught PHP Exception Doctrine\Common\Persistence\Mapping\MappingException: "No mapping file found named 'VetControlClinic.orm.yml' for class 'AgriHealth\AhpBundle\Entity\VetControlClinic

这是双向多对多关系的连接表。相关的架构详细信息如下：

AgriHealth\AhpBundle\Entity\Vet:
    type: entity
    repositoryClass: AgriHealth\AhpBundle\Entity\VetRepository
    manyToOne:
        clinic:
            targetEntity: Clinic
            inversedBy: VetsOfClinic
            joinColumn:
                name: clinic_id
                referencedColumnName: id
    oneToOne:
        user:
            targetEntity: User
            joinColumn:
                name: user_id
                referencedColumnName: id
    manyToMany:
        clinics:
            targetEntity: Clinic
            inversedBy: Vets
            joinTable:
                name: vet_control_clinic
                joinColumns:
                    vet_id:
                        referencedColumnName: id
                inverseJoinColumns:
                    clinic_id:
                        referencedColumnName: id

AgriHealth\AhpBundle\Entity\Clinic:
    type: entity
    table: clinic
    repositoryClass: AgriHealth\AhpBundle\Entity\ClinicRepository
    id:
        id:
            type: integer
            generator: { strategy: AUTO }
    manyToMany:
        Vets:
            targetEntity: Vet
            mappedBy: clinics

根据Doctrine文档，我不确定在VetControlClinic.yml中添加什么，不应该要求什么？