Administration guide > Troubleshoot > Messages > CWOBJ: Messages for the ObjectGrid and related components
CWOBJ4012E
RESTSERVICE_METADATA_INVALID_UNIASSOC_CWOBJ4012E=CWOBJ4012E: The association "{0}" defined for entity "{1}" is not mapped to a target association on entity "{2}". All associations must be bi-directional and have the mapped-by attribute defined.
Explanation
The specified association is not valid. All associations must be bi-directional and have the mapped-by attribute defined.
User response
Add the mappedBy annotation attribute to the entity association or add the mapped-by attribute in the entity descriptor XML file for the entity in the eXtreme Scale configuration.
Parent topic:
CWOBJ: WebSphere eXtreme Scale messages for the ObjectGrid and related components