Executing the Generate Service Areas operation at the REST endpoint using ArcGIS Server 10.2.1 with ObjectID for Facilities parameter with a value greater than 32767 results in the error ‘ERROR 001156: Failed on input OID <value>, could not write value '<value>' to output field ORIG_FID Failed to execute (FeatureClassToFeatureClass).’
The Generate Service Areas geoprocessing service seems to be generating ServiceAreas_Layer output consistently as long as the ObjectIDs of the Facilities are less than 32767.